diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PythonClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PythonClientCodegen.java
index 1260b334af7..96f053d3530 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PythonClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PythonClientCodegen.java
@@ -619,7 +619,15 @@ public class PythonClientCodegen extends DefaultCodegen implements CodegenConfig
     public String toDefaultValue(Schema p) {
         if (ModelUtils.isBooleanSchema(p)) {
             if (p.getDefault() != null) {
-                if (p.getDefault().toString().equalsIgnoreCase("false"))
+                if (Boolean.valueOf(p.getDefault().toString()) == false)
+                    return "False";
+                else
+                    return "True";
+            }
+            // include fallback to example, default defined as server only
+            // example is not defined as server only
+            if (p.getExample() != null) {
+                if (Boolean.valueOf(p.getExample().toString()) == false)
                     return "False";
                 else
                     return "True";
@@ -632,10 +640,24 @@ public class PythonClientCodegen extends DefaultCodegen implements CodegenConfig
             if (p.getDefault() != null) {
                 return p.getDefault().toString();
             }
+            // default numbers are not yet returned by v2 spec openAPI results
+            // https://github.com/swagger-api/swagger-parser/issues/971
+            // include fallback to example, default defined as server only
+            // example is not defined as server only
+            if (p.getExample() != null) {
+                return p.getExample().toString();
+            }
         } else if (ModelUtils.isIntegerSchema(p)) {
             if (p.getDefault() != null) {
                 return p.getDefault().toString();
             }
+            // default integers are not yet returned by v2 spec openAPI results
+            // https://github.com/swagger-api/swagger-parser/issues/971
+            // include fallback to example, default defined as server only
+            // example is not defined as server only
+            if (p.getExample() != null) {
+                return p.getExample().toString();
+            }
         } else if (ModelUtils.isStringSchema(p)) {
             if (p.getDefault() != null) {
                 if (Pattern.compile("\r\n|\r|\n").matcher((String) p.getDefault()).find())
@@ -643,6 +665,23 @@ public class PythonClientCodegen extends DefaultCodegen implements CodegenConfig
                 else
                     return "'" + p.getDefault() + "'";
             }
+            // include fallback to example, default defined as server only
+            // example is not defined as server only
+            if (p.getExample() != null) {
+                if (Pattern.compile("\r\n|\r|\n").matcher((String) p.getExample()).find())
+                    return "'''" + p.getExample() + "'''";
+                else
+                    return "'" + p.getExample() + "'";
+            }
+        } else if (ModelUtils.isArraySchema(p)) {
+            if (p.getDefault() != null) {
+                return p.getDefault().toString();
+            }
+            // include fallback to example, default defined as server only
+            // example is not defined as server only
+            if (p.getExample() != null) {
+                return p.getExample().toString();
+            }
         }
 
         return null;
diff --git a/modules/openapi-generator/src/main/resources/python/model.mustache b/modules/openapi-generator/src/main/resources/python/model.mustache
index cde5cb3718f..c3ab5cb0209 100644
--- a/modules/openapi-generator/src/main/resources/python/model.mustache
+++ b/modules/openapi-generator/src/main/resources/python/model.mustache
@@ -173,7 +173,8 @@ class {{classname}}(object):
 {{#discriminator}}
     def get_real_child_model(self, data):
         """Returns the real base class specified by the discriminator"""
-        discriminator_value = data[self.discriminator]
+        discriminator_key = self.attribute_map[self.discriminator]
+        discriminator_value = data[discriminator_key]
         return self.discriminator_value_class_map.get(discriminator_value)
 
 {{/discriminator}}
diff --git a/modules/openapi-generator/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml b/modules/openapi-generator/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml
index 2a57404e601..d4b466e5c7c 100644
--- a/modules/openapi-generator/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml
+++ b/modules/openapi-generator/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml
@@ -1574,3 +1574,63 @@ definitions:
       sourceURI:
         description: 'Test capitalization'
         type: string
+  TypeHolderDefault:
+    type: object
+    required:
+      - string_item
+      - number_item
+      - integer_item
+      - bool_item
+      - array_item
+    properties:
+      string_item:
+        type: string
+        default: what
+      number_item:
+        type: number
+        default: 1.234
+      integer_item:
+        type: integer
+        default: -2
+      bool_item:
+        type: boolean
+        default: true
+      array_item:
+          type: array
+          items:
+            type: integer
+          default:
+            - 0
+            - 1
+            - 2
+            - 3
+  TypeHolderExample:
+    type: object
+    required:
+      - string_item
+      - number_item
+      - integer_item
+      - bool_item
+      - array_item
+    properties:
+      string_item:
+        type: string
+        example: what
+      number_item:
+        type: number
+        example: 1.234
+      integer_item:
+        type: integer
+        example: -2
+      bool_item:
+        type: boolean
+        example: true
+      array_item:
+          type: array
+          items:
+            type: integer
+          example:
+            - 0
+            - 1
+            - 2
+            - 3
diff --git a/samples/client/petstore-security-test/python/.openapi-generator/VERSION b/samples/client/petstore-security-test/python/.openapi-generator/VERSION
index d077ffb477a..afa63656064 100644
--- a/samples/client/petstore-security-test/python/.openapi-generator/VERSION
+++ b/samples/client/petstore-security-test/python/.openapi-generator/VERSION
@@ -1 +1 @@
-3.3.4-SNAPSHOT
\ No newline at end of file
+4.0.0-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore-security-test/python/README.md b/samples/client/petstore-security-test/python/README.md
index e027eb66ca0..72ef2b830b1 100644
--- a/samples/client/petstore-security-test/python/README.md
+++ b/samples/client/petstore-security-test/python/README.md
@@ -53,11 +53,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.FakeApi(petstore_api.ApiClient(configuration))
-unknown_base_type = petstore_api.UNKNOWN_BASE_TYPE() # UNKNOWN_BASE_TYPE |  (optional)
+test_code_inject____end____rn_n_r = 'test_code_inject____end____rn_n_r_example' # str | To test code injection */ ' \\\" =end -- \\\\r\\\\n \\\\n \\\\r (optional)
 
 try:
     # To test code injection */ ' \" =end -- \\r\\n \\n \\r
-    api_instance.test_code_inject____end__rn_n_r(unknown_base_type=unknown_base_type)
+    api_instance.test_code_inject____end__rn_n_r(test_code_inject____end____rn_n_r=test_code_inject____end____rn_n_r)
 except ApiException as e:
     print("Exception when calling FakeApi->test_code_inject____end__rn_n_r: %s\n" % e)
 
diff --git a/samples/client/petstore-security-test/python/docs/FakeApi.md b/samples/client/petstore-security-test/python/docs/FakeApi.md
index 72e768ee32a..559e39fb202 100644
--- a/samples/client/petstore-security-test/python/docs/FakeApi.md
+++ b/samples/client/petstore-security-test/python/docs/FakeApi.md
@@ -8,7 +8,7 @@ Method | HTTP request | Description
 
 
 # **test_code_inject____end__rn_n_r**
-> test_code_inject____end__rn_n_r(unknown_base_type=unknown_base_type)
+> test_code_inject____end__rn_n_r(test_code_inject____end____rn_n_r=test_code_inject____end____rn_n_r)
 
 To test code injection */ ' \" =end -- \\r\\n \\n \\r
 
@@ -24,11 +24,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.FakeApi()
-unknown_base_type = petstore_api.UNKNOWN_BASE_TYPE() # UNKNOWN_BASE_TYPE |  (optional)
+test_code_inject____end____rn_n_r = 'test_code_inject____end____rn_n_r_example' # str | To test code injection */ ' \\\" =end -- \\\\r\\\\n \\\\n \\\\r (optional)
 
 try:
     # To test code injection */ ' \" =end -- \\r\\n \\n \\r
-    api_instance.test_code_inject____end__rn_n_r(unknown_base_type=unknown_base_type)
+    api_instance.test_code_inject____end__rn_n_r(test_code_inject____end____rn_n_r=test_code_inject____end____rn_n_r)
 except ApiException as e:
     print("Exception when calling FakeApi->test_code_inject____end__rn_n_r: %s\n" % e)
 ```
@@ -37,7 +37,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **unknown_base_type** | [**UNKNOWN_BASE_TYPE**](UNKNOWN_BASE_TYPE.md)|  | [optional] 
+ **test_code_inject____end____rn_n_r** | **str**| To test code injection */ ' \\\" =end -- \\\\r\\\\n \\\\n \\\\r | [optional] 
 
 ### Return type
 
@@ -49,7 +49,7 @@ No authorization required
 
 ### HTTP request headers
 
- - **Content-Type**: application/json, */  \" =end --       
+ - **Content-Type**: application/x-www-form-urlencoded, */  \" =end --       
  - **Accept**: Not defined
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
diff --git a/samples/client/petstore-security-test/python/petstore_api/api/fake_api.py b/samples/client/petstore-security-test/python/petstore_api/api/fake_api.py
index 1a5c77c31dc..24a1c4fe1b9 100644
--- a/samples/client/petstore-security-test/python/petstore_api/api/fake_api.py
+++ b/samples/client/petstore-security-test/python/petstore_api/api/fake_api.py
@@ -43,7 +43,7 @@ class FakeApi(object):
         >>> result = thread.get()
 
         :param async_req bool
-        :param UNKNOWN_BASE_TYPE unknown_base_type:
+        :param str test_code_inject____end____rn_n_r: To test code injection */ ' \\\" =end -- \\\\r\\\\n \\\\n \\\\r
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -65,7 +65,7 @@ class FakeApi(object):
         >>> result = thread.get()
 
         :param async_req bool
-        :param UNKNOWN_BASE_TYPE unknown_base_type:
+        :param str test_code_inject____end____rn_n_r: To test code injection */ ' \\\" =end -- \\\\r\\\\n \\\\n \\\\r
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -73,7 +73,7 @@ class FakeApi(object):
 
         local_var_params = locals()
 
-        all_params = ['unknown_base_type']  # noqa: E501
+        all_params = ['test_code_inject____end____rn_n_r']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -98,13 +98,13 @@ class FakeApi(object):
 
         form_params = []
         local_var_files = {}
+        if 'test_code_inject____end____rn_n_r' in local_var_params:
+            form_params.append(('test code inject */ ' " =end -- \r\n \n \r', local_var_params['test_code_inject____end____rn_n_r']))  # noqa: E501
 
         body_params = None
-        if 'unknown_base_type' in local_var_params:
-            body_params = local_var_params['unknown_base_type']
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
-            ['application/json', '*/  \" =end --       '])  # noqa: E501
+            ['application/x-www-form-urlencoded', '*/  \" =end --       '])  # noqa: E501
 
         # Authentication setting
         auth_settings = []  # noqa: E501
diff --git a/samples/client/petstore-security-test/python/petstore_api/api_client.py b/samples/client/petstore-security-test/python/petstore_api/api_client.py
index d22cf174fac..acf72f112ea 100644
--- a/samples/client/petstore-security-test/python/petstore_api/api_client.py
+++ b/samples/client/petstore-security-test/python/petstore_api/api_client.py
@@ -64,7 +64,7 @@ class ApiClient(object):
     _pool = None
 
     def __init__(self, configuration=None, header_name=None, header_value=None,
-                 cookie=None, pool_threads=None):
+                 cookie=None, pool_threads=1):
         if configuration is None:
             configuration = Configuration()
         self.configuration = configuration
diff --git a/samples/client/petstore/csharp/OpenAPIClient/README.md b/samples/client/petstore/csharp/OpenAPIClient/README.md
index 8dc6d97251c..b5d79ff2d96 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/README.md
+++ b/samples/client/petstore/csharp/OpenAPIClient/README.md
@@ -169,6 +169,8 @@ Class | Method | HTTP request | Description
  - [Model.Return](docs/Return.md)
  - [Model.SpecialModelName](docs/SpecialModelName.md)
  - [Model.Tag](docs/Tag.md)
+ - [Model.TypeHolderDefault](docs/TypeHolderDefault.md)
+ - [Model.TypeHolderExample](docs/TypeHolderExample.md)
  - [Model.User](docs/User.md)
 
 
diff --git a/samples/client/petstore/csharp/OpenAPIClient/docs/TypeHolderDefault.md b/samples/client/petstore/csharp/OpenAPIClient/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..ee75c65ff1f
--- /dev/null
+++ b/samples/client/petstore/csharp/OpenAPIClient/docs/TypeHolderDefault.md
@@ -0,0 +1,13 @@
+# Org.OpenAPITools.Model.TypeHolderDefault
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**StringItem** | **string** |  | [default to "what"]
+**NumberItem** | **decimal?** |  | 
+**IntegerItem** | **int?** |  | 
+**BoolItem** | **bool?** |  | [default to true]
+**ArrayItem** | **List<int?>** |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
diff --git a/samples/client/petstore/csharp/OpenAPIClient/docs/TypeHolderExample.md b/samples/client/petstore/csharp/OpenAPIClient/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..0fec0db562e
--- /dev/null
+++ b/samples/client/petstore/csharp/OpenAPIClient/docs/TypeHolderExample.md
@@ -0,0 +1,13 @@
+# Org.OpenAPITools.Model.TypeHolderExample
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**StringItem** | **string** |  | 
+**NumberItem** | **decimal?** |  | 
+**IntegerItem** | **int?** |  | 
+**BoolItem** | **bool?** |  | 
+**ArrayItem** | **List<int?>** |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools.Test/Model/TypeHolderDefaultTests.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools.Test/Model/TypeHolderDefaultTests.cs
new file mode 100644
index 00000000000..f4c78879bf0
--- /dev/null
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools.Test/Model/TypeHolderDefaultTests.cs
@@ -0,0 +1,112 @@
+/* 
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using NUnit.Framework;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+using Newtonsoft.Json;
+
+namespace Org.OpenAPITools.Test
+{
+    /// <summary>
+    ///  Class for testing TypeHolderDefault
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    [TestFixture]
+    public class TypeHolderDefaultTests
+    {
+        // TODO uncomment below to declare an instance variable for TypeHolderDefault
+        //private TypeHolderDefault instance;
+
+        /// <summary>
+        /// Setup before each test
+        /// </summary>
+        [SetUp]
+        public void Init()
+        {
+            // TODO uncomment below to create an instance of TypeHolderDefault
+            //instance = new TypeHolderDefault();
+        }
+
+        /// <summary>
+        /// Clean up after each test
+        /// </summary>
+        [TearDown]
+        public void Cleanup()
+        {
+
+        }
+
+        /// <summary>
+        /// Test an instance of TypeHolderDefault
+        /// </summary>
+        [Test]
+        public void TypeHolderDefaultInstanceTest()
+        {
+            // TODO uncomment below to test "IsInstanceOfType" TypeHolderDefault
+            //Assert.IsInstanceOfType<TypeHolderDefault> (instance, "variable 'instance' is a TypeHolderDefault");
+        }
+
+
+        /// <summary>
+        /// Test the property 'StringItem'
+        /// </summary>
+        [Test]
+        public void StringItemTest()
+        {
+            // TODO unit test for the property 'StringItem'
+        }
+        /// <summary>
+        /// Test the property 'NumberItem'
+        /// </summary>
+        [Test]
+        public void NumberItemTest()
+        {
+            // TODO unit test for the property 'NumberItem'
+        }
+        /// <summary>
+        /// Test the property 'IntegerItem'
+        /// </summary>
+        [Test]
+        public void IntegerItemTest()
+        {
+            // TODO unit test for the property 'IntegerItem'
+        }
+        /// <summary>
+        /// Test the property 'BoolItem'
+        /// </summary>
+        [Test]
+        public void BoolItemTest()
+        {
+            // TODO unit test for the property 'BoolItem'
+        }
+        /// <summary>
+        /// Test the property 'ArrayItem'
+        /// </summary>
+        [Test]
+        public void ArrayItemTest()
+        {
+            // TODO unit test for the property 'ArrayItem'
+        }
+
+    }
+
+}
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools.Test/Model/TypeHolderExampleTests.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools.Test/Model/TypeHolderExampleTests.cs
new file mode 100644
index 00000000000..a4760f2c4c9
--- /dev/null
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools.Test/Model/TypeHolderExampleTests.cs
@@ -0,0 +1,112 @@
+/* 
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using NUnit.Framework;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+using Newtonsoft.Json;
+
+namespace Org.OpenAPITools.Test
+{
+    /// <summary>
+    ///  Class for testing TypeHolderExample
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    [TestFixture]
+    public class TypeHolderExampleTests
+    {
+        // TODO uncomment below to declare an instance variable for TypeHolderExample
+        //private TypeHolderExample instance;
+
+        /// <summary>
+        /// Setup before each test
+        /// </summary>
+        [SetUp]
+        public void Init()
+        {
+            // TODO uncomment below to create an instance of TypeHolderExample
+            //instance = new TypeHolderExample();
+        }
+
+        /// <summary>
+        /// Clean up after each test
+        /// </summary>
+        [TearDown]
+        public void Cleanup()
+        {
+
+        }
+
+        /// <summary>
+        /// Test an instance of TypeHolderExample
+        /// </summary>
+        [Test]
+        public void TypeHolderExampleInstanceTest()
+        {
+            // TODO uncomment below to test "IsInstanceOfType" TypeHolderExample
+            //Assert.IsInstanceOfType<TypeHolderExample> (instance, "variable 'instance' is a TypeHolderExample");
+        }
+
+
+        /// <summary>
+        /// Test the property 'StringItem'
+        /// </summary>
+        [Test]
+        public void StringItemTest()
+        {
+            // TODO unit test for the property 'StringItem'
+        }
+        /// <summary>
+        /// Test the property 'NumberItem'
+        /// </summary>
+        [Test]
+        public void NumberItemTest()
+        {
+            // TODO unit test for the property 'NumberItem'
+        }
+        /// <summary>
+        /// Test the property 'IntegerItem'
+        /// </summary>
+        [Test]
+        public void IntegerItemTest()
+        {
+            // TODO unit test for the property 'IntegerItem'
+        }
+        /// <summary>
+        /// Test the property 'BoolItem'
+        /// </summary>
+        [Test]
+        public void BoolItemTest()
+        {
+            // TODO unit test for the property 'BoolItem'
+        }
+        /// <summary>
+        /// Test the property 'ArrayItem'
+        /// </summary>
+        [Test]
+        public void ArrayItemTest()
+        {
+            // TODO unit test for the property 'ArrayItem'
+        }
+
+    }
+
+}
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/TypeHolderDefault.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/TypeHolderDefault.cs
new file mode 100644
index 00000000000..1409cbbf136
--- /dev/null
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/TypeHolderDefault.cs
@@ -0,0 +1,233 @@
+/* 
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Runtime.Serialization;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIDateConverter = Org.OpenAPITools.Client.OpenAPIDateConverter;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// TypeHolderDefault
+    /// </summary>
+    [DataContract]
+    public partial class TypeHolderDefault :  IEquatable<TypeHolderDefault>, IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TypeHolderDefault" /> class.
+        /// </summary>
+        [JsonConstructorAttribute]
+        protected TypeHolderDefault() { }
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TypeHolderDefault" /> class.
+        /// </summary>
+        /// <param name="stringItem">stringItem (required) (default to &quot;what&quot;).</param>
+        /// <param name="numberItem">numberItem (required).</param>
+        /// <param name="integerItem">integerItem (required).</param>
+        /// <param name="boolItem">boolItem (required) (default to true).</param>
+        /// <param name="arrayItem">arrayItem (required).</param>
+        public TypeHolderDefault(string stringItem = "what", decimal? numberItem = default(decimal?), int? integerItem = default(int?), bool? boolItem = true, List<int?> arrayItem = default(List<int?>))
+        {
+            // to ensure "stringItem" is required (not null)
+            if (stringItem == null)
+            {
+                throw new InvalidDataException("stringItem is a required property for TypeHolderDefault and cannot be null");
+            }
+            else
+            {
+                this.StringItem = stringItem;
+            }
+            // to ensure "numberItem" is required (not null)
+            if (numberItem == null)
+            {
+                throw new InvalidDataException("numberItem is a required property for TypeHolderDefault and cannot be null");
+            }
+            else
+            {
+                this.NumberItem = numberItem;
+            }
+            // to ensure "integerItem" is required (not null)
+            if (integerItem == null)
+            {
+                throw new InvalidDataException("integerItem is a required property for TypeHolderDefault and cannot be null");
+            }
+            else
+            {
+                this.IntegerItem = integerItem;
+            }
+            // to ensure "boolItem" is required (not null)
+            if (boolItem == null)
+            {
+                throw new InvalidDataException("boolItem is a required property for TypeHolderDefault and cannot be null");
+            }
+            else
+            {
+                this.BoolItem = boolItem;
+            }
+            // to ensure "arrayItem" is required (not null)
+            if (arrayItem == null)
+            {
+                throw new InvalidDataException("arrayItem is a required property for TypeHolderDefault and cannot be null");
+            }
+            else
+            {
+                this.ArrayItem = arrayItem;
+            }
+        }
+        
+        /// <summary>
+        /// Gets or Sets StringItem
+        /// </summary>
+        [DataMember(Name="string_item", EmitDefaultValue=false)]
+        public string StringItem { get; set; }
+
+        /// <summary>
+        /// Gets or Sets NumberItem
+        /// </summary>
+        [DataMember(Name="number_item", EmitDefaultValue=false)]
+        public decimal? NumberItem { get; set; }
+
+        /// <summary>
+        /// Gets or Sets IntegerItem
+        /// </summary>
+        [DataMember(Name="integer_item", EmitDefaultValue=false)]
+        public int? IntegerItem { get; set; }
+
+        /// <summary>
+        /// Gets or Sets BoolItem
+        /// </summary>
+        [DataMember(Name="bool_item", EmitDefaultValue=false)]
+        public bool? BoolItem { get; set; }
+
+        /// <summary>
+        /// Gets or Sets ArrayItem
+        /// </summary>
+        [DataMember(Name="array_item", EmitDefaultValue=false)]
+        public List<int?> ArrayItem { get; set; }
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("class TypeHolderDefault {\n");
+            sb.Append("  StringItem: ").Append(StringItem).Append("\n");
+            sb.Append("  NumberItem: ").Append(NumberItem).Append("\n");
+            sb.Append("  IntegerItem: ").Append(IntegerItem).Append("\n");
+            sb.Append("  BoolItem: ").Append(BoolItem).Append("\n");
+            sb.Append("  ArrayItem: ").Append(ArrayItem).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+  
+        /// <summary>
+        /// Returns the JSON string presentation of the object
+        /// </summary>
+        /// <returns>JSON string presentation of the object</returns>
+        public virtual string ToJson()
+        {
+            return JsonConvert.SerializeObject(this, Formatting.Indented);
+        }
+
+        /// <summary>
+        /// Returns true if objects are equal
+        /// </summary>
+        /// <param name="input">Object to be compared</param>
+        /// <returns>Boolean</returns>
+        public override bool Equals(object input)
+        {
+            return this.Equals(input as TypeHolderDefault);
+        }
+
+        /// <summary>
+        /// Returns true if TypeHolderDefault instances are equal
+        /// </summary>
+        /// <param name="input">Instance of TypeHolderDefault to be compared</param>
+        /// <returns>Boolean</returns>
+        public bool Equals(TypeHolderDefault input)
+        {
+            if (input == null)
+                return false;
+
+            return 
+                (
+                    this.StringItem == input.StringItem ||
+                    (this.StringItem != null &&
+                    this.StringItem.Equals(input.StringItem))
+                ) && 
+                (
+                    this.NumberItem == input.NumberItem ||
+                    (this.NumberItem != null &&
+                    this.NumberItem.Equals(input.NumberItem))
+                ) && 
+                (
+                    this.IntegerItem == input.IntegerItem ||
+                    (this.IntegerItem != null &&
+                    this.IntegerItem.Equals(input.IntegerItem))
+                ) && 
+                (
+                    this.BoolItem == input.BoolItem ||
+                    (this.BoolItem != null &&
+                    this.BoolItem.Equals(input.BoolItem))
+                ) && 
+                (
+                    this.ArrayItem == input.ArrayItem ||
+                    this.ArrayItem != null &&
+                    this.ArrayItem.SequenceEqual(input.ArrayItem)
+                );
+        }
+
+        /// <summary>
+        /// Gets the hash code
+        /// </summary>
+        /// <returns>Hash code</returns>
+        public override int GetHashCode()
+        {
+            unchecked // Overflow is fine, just wrap
+            {
+                int hashCode = 41;
+                if (this.StringItem != null)
+                    hashCode = hashCode * 59 + this.StringItem.GetHashCode();
+                if (this.NumberItem != null)
+                    hashCode = hashCode * 59 + this.NumberItem.GetHashCode();
+                if (this.IntegerItem != null)
+                    hashCode = hashCode * 59 + this.IntegerItem.GetHashCode();
+                if (this.BoolItem != null)
+                    hashCode = hashCode * 59 + this.BoolItem.GetHashCode();
+                if (this.ArrayItem != null)
+                    hashCode = hashCode * 59 + this.ArrayItem.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+}
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/TypeHolderExample.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/TypeHolderExample.cs
new file mode 100644
index 00000000000..cb590435f01
--- /dev/null
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/TypeHolderExample.cs
@@ -0,0 +1,233 @@
+/* 
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Runtime.Serialization;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIDateConverter = Org.OpenAPITools.Client.OpenAPIDateConverter;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// TypeHolderExample
+    /// </summary>
+    [DataContract]
+    public partial class TypeHolderExample :  IEquatable<TypeHolderExample>, IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TypeHolderExample" /> class.
+        /// </summary>
+        [JsonConstructorAttribute]
+        protected TypeHolderExample() { }
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TypeHolderExample" /> class.
+        /// </summary>
+        /// <param name="stringItem">stringItem (required).</param>
+        /// <param name="numberItem">numberItem (required).</param>
+        /// <param name="integerItem">integerItem (required).</param>
+        /// <param name="boolItem">boolItem (required).</param>
+        /// <param name="arrayItem">arrayItem (required).</param>
+        public TypeHolderExample(string stringItem = default(string), decimal? numberItem = default(decimal?), int? integerItem = default(int?), bool? boolItem = default(bool?), List<int?> arrayItem = default(List<int?>))
+        {
+            // to ensure "stringItem" is required (not null)
+            if (stringItem == null)
+            {
+                throw new InvalidDataException("stringItem is a required property for TypeHolderExample and cannot be null");
+            }
+            else
+            {
+                this.StringItem = stringItem;
+            }
+            // to ensure "numberItem" is required (not null)
+            if (numberItem == null)
+            {
+                throw new InvalidDataException("numberItem is a required property for TypeHolderExample and cannot be null");
+            }
+            else
+            {
+                this.NumberItem = numberItem;
+            }
+            // to ensure "integerItem" is required (not null)
+            if (integerItem == null)
+            {
+                throw new InvalidDataException("integerItem is a required property for TypeHolderExample and cannot be null");
+            }
+            else
+            {
+                this.IntegerItem = integerItem;
+            }
+            // to ensure "boolItem" is required (not null)
+            if (boolItem == null)
+            {
+                throw new InvalidDataException("boolItem is a required property for TypeHolderExample and cannot be null");
+            }
+            else
+            {
+                this.BoolItem = boolItem;
+            }
+            // to ensure "arrayItem" is required (not null)
+            if (arrayItem == null)
+            {
+                throw new InvalidDataException("arrayItem is a required property for TypeHolderExample and cannot be null");
+            }
+            else
+            {
+                this.ArrayItem = arrayItem;
+            }
+        }
+        
+        /// <summary>
+        /// Gets or Sets StringItem
+        /// </summary>
+        [DataMember(Name="string_item", EmitDefaultValue=false)]
+        public string StringItem { get; set; }
+
+        /// <summary>
+        /// Gets or Sets NumberItem
+        /// </summary>
+        [DataMember(Name="number_item", EmitDefaultValue=false)]
+        public decimal? NumberItem { get; set; }
+
+        /// <summary>
+        /// Gets or Sets IntegerItem
+        /// </summary>
+        [DataMember(Name="integer_item", EmitDefaultValue=false)]
+        public int? IntegerItem { get; set; }
+
+        /// <summary>
+        /// Gets or Sets BoolItem
+        /// </summary>
+        [DataMember(Name="bool_item", EmitDefaultValue=false)]
+        public bool? BoolItem { get; set; }
+
+        /// <summary>
+        /// Gets or Sets ArrayItem
+        /// </summary>
+        [DataMember(Name="array_item", EmitDefaultValue=false)]
+        public List<int?> ArrayItem { get; set; }
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("class TypeHolderExample {\n");
+            sb.Append("  StringItem: ").Append(StringItem).Append("\n");
+            sb.Append("  NumberItem: ").Append(NumberItem).Append("\n");
+            sb.Append("  IntegerItem: ").Append(IntegerItem).Append("\n");
+            sb.Append("  BoolItem: ").Append(BoolItem).Append("\n");
+            sb.Append("  ArrayItem: ").Append(ArrayItem).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+  
+        /// <summary>
+        /// Returns the JSON string presentation of the object
+        /// </summary>
+        /// <returns>JSON string presentation of the object</returns>
+        public virtual string ToJson()
+        {
+            return JsonConvert.SerializeObject(this, Formatting.Indented);
+        }
+
+        /// <summary>
+        /// Returns true if objects are equal
+        /// </summary>
+        /// <param name="input">Object to be compared</param>
+        /// <returns>Boolean</returns>
+        public override bool Equals(object input)
+        {
+            return this.Equals(input as TypeHolderExample);
+        }
+
+        /// <summary>
+        /// Returns true if TypeHolderExample instances are equal
+        /// </summary>
+        /// <param name="input">Instance of TypeHolderExample to be compared</param>
+        /// <returns>Boolean</returns>
+        public bool Equals(TypeHolderExample input)
+        {
+            if (input == null)
+                return false;
+
+            return 
+                (
+                    this.StringItem == input.StringItem ||
+                    (this.StringItem != null &&
+                    this.StringItem.Equals(input.StringItem))
+                ) && 
+                (
+                    this.NumberItem == input.NumberItem ||
+                    (this.NumberItem != null &&
+                    this.NumberItem.Equals(input.NumberItem))
+                ) && 
+                (
+                    this.IntegerItem == input.IntegerItem ||
+                    (this.IntegerItem != null &&
+                    this.IntegerItem.Equals(input.IntegerItem))
+                ) && 
+                (
+                    this.BoolItem == input.BoolItem ||
+                    (this.BoolItem != null &&
+                    this.BoolItem.Equals(input.BoolItem))
+                ) && 
+                (
+                    this.ArrayItem == input.ArrayItem ||
+                    this.ArrayItem != null &&
+                    this.ArrayItem.SequenceEqual(input.ArrayItem)
+                );
+        }
+
+        /// <summary>
+        /// Gets the hash code
+        /// </summary>
+        /// <returns>Hash code</returns>
+        public override int GetHashCode()
+        {
+            unchecked // Overflow is fine, just wrap
+            {
+                int hashCode = 41;
+                if (this.StringItem != null)
+                    hashCode = hashCode * 59 + this.StringItem.GetHashCode();
+                if (this.NumberItem != null)
+                    hashCode = hashCode * 59 + this.NumberItem.GetHashCode();
+                if (this.IntegerItem != null)
+                    hashCode = hashCode * 59 + this.IntegerItem.GetHashCode();
+                if (this.BoolItem != null)
+                    hashCode = hashCode * 59 + this.BoolItem.GetHashCode();
+                if (this.ArrayItem != null)
+                    hashCode = hashCode * 59 + this.ArrayItem.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+}
diff --git a/samples/client/petstore/go/go-petstore/README.md b/samples/client/petstore/go/go-petstore/README.md
index c6ffd9374bf..4bca622853b 100644
--- a/samples/client/petstore/go/go-petstore/README.md
+++ b/samples/client/petstore/go/go-petstore/README.md
@@ -102,6 +102,8 @@ Class | Method | HTTP request | Description
  - [Return](docs/Return.md)
  - [SpecialModelName](docs/SpecialModelName.md)
  - [Tag](docs/Tag.md)
+ - [TypeHolderDefault](docs/TypeHolderDefault.md)
+ - [TypeHolderExample](docs/TypeHolderExample.md)
  - [User](docs/User.md)
 
 
diff --git a/samples/client/petstore/go/go-petstore/api/openapi.yaml b/samples/client/petstore/go/go-petstore/api/openapi.yaml
index ce1f37c60f2..671c549a19a 100644
--- a/samples/client/petstore/go/go-petstore/api/openapi.yaml
+++ b/samples/client/petstore/go/go-petstore/api/openapi.yaml
@@ -1646,6 +1646,59 @@ components:
           description: Test capitalization
           type: string
       type: object
+    TypeHolderDefault:
+      properties:
+        string_item:
+          default: what
+          type: string
+        number_item:
+          type: number
+        integer_item:
+          type: integer
+        bool_item:
+          default: true
+          type: boolean
+        array_item:
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
+    TypeHolderExample:
+      properties:
+        string_item:
+          example: what
+          type: string
+        number_item:
+          example: 1.234
+          type: number
+        integer_item:
+          example: -2
+          type: integer
+        bool_item:
+          example: true
+          type: boolean
+        array_item:
+          example:
+          - 0
+          - 1
+          - 2
+          - 3
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
   securitySchemes:
     petstore_auth:
       flows:
diff --git a/samples/client/petstore/go/go-petstore/docs/TypeHolderDefault.md b/samples/client/petstore/go/go-petstore/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..080c12a02f4
--- /dev/null
+++ b/samples/client/petstore/go/go-petstore/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**StringItem** | **string** |  | [default to what]
+**NumberItem** | **float32** |  | 
+**IntegerItem** | **int32** |  | 
+**BoolItem** | **bool** |  | [default to true]
+**ArrayItem** | **[]int32** |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/samples/client/petstore/go/go-petstore/docs/TypeHolderExample.md b/samples/client/petstore/go/go-petstore/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..231c2a18722
--- /dev/null
+++ b/samples/client/petstore/go/go-petstore/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**StringItem** | **string** |  | 
+**NumberItem** | **float32** |  | 
+**IntegerItem** | **int32** |  | 
+**BoolItem** | **bool** |  | 
+**ArrayItem** | **[]int32** |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/samples/client/petstore/go/go-petstore/model_type_holder_default.go b/samples/client/petstore/go/go-petstore/model_type_holder_default.go
new file mode 100644
index 00000000000..68e1218ec95
--- /dev/null
+++ b/samples/client/petstore/go/go-petstore/model_type_holder_default.go
@@ -0,0 +1,18 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * API version: 1.0.0
+ * Generated by: OpenAPI Generator (https://openapi-generator.tech)
+ */
+
+package petstore
+
+type TypeHolderDefault struct {
+	StringItem string `json:"string_item"`
+	NumberItem float32 `json:"number_item"`
+	IntegerItem int32 `json:"integer_item"`
+	BoolItem bool `json:"bool_item"`
+	ArrayItem []int32 `json:"array_item"`
+}
diff --git a/samples/client/petstore/go/go-petstore/model_type_holder_example.go b/samples/client/petstore/go/go-petstore/model_type_holder_example.go
new file mode 100644
index 00000000000..e129bb6a765
--- /dev/null
+++ b/samples/client/petstore/go/go-petstore/model_type_holder_example.go
@@ -0,0 +1,18 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * API version: 1.0.0
+ * Generated by: OpenAPI Generator (https://openapi-generator.tech)
+ */
+
+package petstore
+
+type TypeHolderExample struct {
+	StringItem string `json:"string_item"`
+	NumberItem float32 `json:"number_item"`
+	IntegerItem int32 `json:"integer_item"`
+	BoolItem bool `json:"bool_item"`
+	ArrayItem []int32 `json:"array_item"`
+}
diff --git a/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/Model.hs b/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/Model.hs
index af315d1b361..f9926acccda 100644
--- a/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/Model.hs
+++ b/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/Model.hs
@@ -1330,6 +1330,104 @@ mkTag =
   , tagName = Nothing
   }
 
+-- ** TypeHolderDefault
+-- | TypeHolderDefault
+data TypeHolderDefault = TypeHolderDefault
+  { typeHolderDefaultStringItem :: !(Text) -- ^ /Required/ "string_item"
+  , typeHolderDefaultNumberItem :: !(Double) -- ^ /Required/ "number_item"
+  , typeHolderDefaultIntegerItem :: !(Int) -- ^ /Required/ "integer_item"
+  , typeHolderDefaultBoolItem :: !(Bool) -- ^ /Required/ "bool_item"
+  , typeHolderDefaultArrayItem :: !([Int]) -- ^ /Required/ "array_item"
+  } deriving (P.Show, P.Eq, P.Typeable)
+
+-- | FromJSON TypeHolderDefault
+instance A.FromJSON TypeHolderDefault where
+  parseJSON = A.withObject "TypeHolderDefault" $ \o ->
+    TypeHolderDefault
+      <$> (o .:  "string_item")
+      <*> (o .:  "number_item")
+      <*> (o .:  "integer_item")
+      <*> (o .:  "bool_item")
+      <*> (o .:  "array_item")
+
+-- | ToJSON TypeHolderDefault
+instance A.ToJSON TypeHolderDefault where
+  toJSON TypeHolderDefault {..} =
+   _omitNulls
+      [ "string_item" .= typeHolderDefaultStringItem
+      , "number_item" .= typeHolderDefaultNumberItem
+      , "integer_item" .= typeHolderDefaultIntegerItem
+      , "bool_item" .= typeHolderDefaultBoolItem
+      , "array_item" .= typeHolderDefaultArrayItem
+      ]
+
+
+-- | Construct a value of type 'TypeHolderDefault' (by applying it's required fields, if any)
+mkTypeHolderDefault
+  :: Text -- ^ 'typeHolderDefaultStringItem' 
+  -> Double -- ^ 'typeHolderDefaultNumberItem' 
+  -> Int -- ^ 'typeHolderDefaultIntegerItem' 
+  -> Bool -- ^ 'typeHolderDefaultBoolItem' 
+  -> [Int] -- ^ 'typeHolderDefaultArrayItem' 
+  -> TypeHolderDefault
+mkTypeHolderDefault typeHolderDefaultStringItem typeHolderDefaultNumberItem typeHolderDefaultIntegerItem typeHolderDefaultBoolItem typeHolderDefaultArrayItem =
+  TypeHolderDefault
+  { typeHolderDefaultStringItem
+  , typeHolderDefaultNumberItem
+  , typeHolderDefaultIntegerItem
+  , typeHolderDefaultBoolItem
+  , typeHolderDefaultArrayItem
+  }
+
+-- ** TypeHolderExample
+-- | TypeHolderExample
+data TypeHolderExample = TypeHolderExample
+  { typeHolderExampleStringItem :: !(Text) -- ^ /Required/ "string_item"
+  , typeHolderExampleNumberItem :: !(Double) -- ^ /Required/ "number_item"
+  , typeHolderExampleIntegerItem :: !(Int) -- ^ /Required/ "integer_item"
+  , typeHolderExampleBoolItem :: !(Bool) -- ^ /Required/ "bool_item"
+  , typeHolderExampleArrayItem :: !([Int]) -- ^ /Required/ "array_item"
+  } deriving (P.Show, P.Eq, P.Typeable)
+
+-- | FromJSON TypeHolderExample
+instance A.FromJSON TypeHolderExample where
+  parseJSON = A.withObject "TypeHolderExample" $ \o ->
+    TypeHolderExample
+      <$> (o .:  "string_item")
+      <*> (o .:  "number_item")
+      <*> (o .:  "integer_item")
+      <*> (o .:  "bool_item")
+      <*> (o .:  "array_item")
+
+-- | ToJSON TypeHolderExample
+instance A.ToJSON TypeHolderExample where
+  toJSON TypeHolderExample {..} =
+   _omitNulls
+      [ "string_item" .= typeHolderExampleStringItem
+      , "number_item" .= typeHolderExampleNumberItem
+      , "integer_item" .= typeHolderExampleIntegerItem
+      , "bool_item" .= typeHolderExampleBoolItem
+      , "array_item" .= typeHolderExampleArrayItem
+      ]
+
+
+-- | Construct a value of type 'TypeHolderExample' (by applying it's required fields, if any)
+mkTypeHolderExample
+  :: Text -- ^ 'typeHolderExampleStringItem' 
+  -> Double -- ^ 'typeHolderExampleNumberItem' 
+  -> Int -- ^ 'typeHolderExampleIntegerItem' 
+  -> Bool -- ^ 'typeHolderExampleBoolItem' 
+  -> [Int] -- ^ 'typeHolderExampleArrayItem' 
+  -> TypeHolderExample
+mkTypeHolderExample typeHolderExampleStringItem typeHolderExampleNumberItem typeHolderExampleIntegerItem typeHolderExampleBoolItem typeHolderExampleArrayItem =
+  TypeHolderExample
+  { typeHolderExampleStringItem
+  , typeHolderExampleNumberItem
+  , typeHolderExampleIntegerItem
+  , typeHolderExampleBoolItem
+  , typeHolderExampleArrayItem
+  }
+
 -- ** User
 -- | User
 data User = User
diff --git a/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/ModelLens.hs b/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/ModelLens.hs
index 0b8a2a84813..6cb6f6d7e5f 100644
--- a/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/ModelLens.hs
+++ b/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/ModelLens.hs
@@ -613,6 +613,64 @@ tagNameL f Tag{..} = (\tagName -> Tag { tagName, ..} ) <$> f tagName
 
 
 
+-- * TypeHolderDefault
+
+-- | 'typeHolderDefaultStringItem' Lens
+typeHolderDefaultStringItemL :: Lens_' TypeHolderDefault (Text)
+typeHolderDefaultStringItemL f TypeHolderDefault{..} = (\typeHolderDefaultStringItem -> TypeHolderDefault { typeHolderDefaultStringItem, ..} ) <$> f typeHolderDefaultStringItem
+{-# INLINE typeHolderDefaultStringItemL #-}
+
+-- | 'typeHolderDefaultNumberItem' Lens
+typeHolderDefaultNumberItemL :: Lens_' TypeHolderDefault (Double)
+typeHolderDefaultNumberItemL f TypeHolderDefault{..} = (\typeHolderDefaultNumberItem -> TypeHolderDefault { typeHolderDefaultNumberItem, ..} ) <$> f typeHolderDefaultNumberItem
+{-# INLINE typeHolderDefaultNumberItemL #-}
+
+-- | 'typeHolderDefaultIntegerItem' Lens
+typeHolderDefaultIntegerItemL :: Lens_' TypeHolderDefault (Int)
+typeHolderDefaultIntegerItemL f TypeHolderDefault{..} = (\typeHolderDefaultIntegerItem -> TypeHolderDefault { typeHolderDefaultIntegerItem, ..} ) <$> f typeHolderDefaultIntegerItem
+{-# INLINE typeHolderDefaultIntegerItemL #-}
+
+-- | 'typeHolderDefaultBoolItem' Lens
+typeHolderDefaultBoolItemL :: Lens_' TypeHolderDefault (Bool)
+typeHolderDefaultBoolItemL f TypeHolderDefault{..} = (\typeHolderDefaultBoolItem -> TypeHolderDefault { typeHolderDefaultBoolItem, ..} ) <$> f typeHolderDefaultBoolItem
+{-# INLINE typeHolderDefaultBoolItemL #-}
+
+-- | 'typeHolderDefaultArrayItem' Lens
+typeHolderDefaultArrayItemL :: Lens_' TypeHolderDefault ([Int])
+typeHolderDefaultArrayItemL f TypeHolderDefault{..} = (\typeHolderDefaultArrayItem -> TypeHolderDefault { typeHolderDefaultArrayItem, ..} ) <$> f typeHolderDefaultArrayItem
+{-# INLINE typeHolderDefaultArrayItemL #-}
+
+
+
+-- * TypeHolderExample
+
+-- | 'typeHolderExampleStringItem' Lens
+typeHolderExampleStringItemL :: Lens_' TypeHolderExample (Text)
+typeHolderExampleStringItemL f TypeHolderExample{..} = (\typeHolderExampleStringItem -> TypeHolderExample { typeHolderExampleStringItem, ..} ) <$> f typeHolderExampleStringItem
+{-# INLINE typeHolderExampleStringItemL #-}
+
+-- | 'typeHolderExampleNumberItem' Lens
+typeHolderExampleNumberItemL :: Lens_' TypeHolderExample (Double)
+typeHolderExampleNumberItemL f TypeHolderExample{..} = (\typeHolderExampleNumberItem -> TypeHolderExample { typeHolderExampleNumberItem, ..} ) <$> f typeHolderExampleNumberItem
+{-# INLINE typeHolderExampleNumberItemL #-}
+
+-- | 'typeHolderExampleIntegerItem' Lens
+typeHolderExampleIntegerItemL :: Lens_' TypeHolderExample (Int)
+typeHolderExampleIntegerItemL f TypeHolderExample{..} = (\typeHolderExampleIntegerItem -> TypeHolderExample { typeHolderExampleIntegerItem, ..} ) <$> f typeHolderExampleIntegerItem
+{-# INLINE typeHolderExampleIntegerItemL #-}
+
+-- | 'typeHolderExampleBoolItem' Lens
+typeHolderExampleBoolItemL :: Lens_' TypeHolderExample (Bool)
+typeHolderExampleBoolItemL f TypeHolderExample{..} = (\typeHolderExampleBoolItem -> TypeHolderExample { typeHolderExampleBoolItem, ..} ) <$> f typeHolderExampleBoolItem
+{-# INLINE typeHolderExampleBoolItemL #-}
+
+-- | 'typeHolderExampleArrayItem' Lens
+typeHolderExampleArrayItemL :: Lens_' TypeHolderExample ([Int])
+typeHolderExampleArrayItemL f TypeHolderExample{..} = (\typeHolderExampleArrayItem -> TypeHolderExample { typeHolderExampleArrayItem, ..} ) <$> f typeHolderExampleArrayItem
+{-# INLINE typeHolderExampleArrayItemL #-}
+
+
+
 -- * User
 
 -- | 'userId' Lens
diff --git a/samples/client/petstore/haskell-http-client/openapi.yaml b/samples/client/petstore/haskell-http-client/openapi.yaml
index ce1f37c60f2..671c549a19a 100644
--- a/samples/client/petstore/haskell-http-client/openapi.yaml
+++ b/samples/client/petstore/haskell-http-client/openapi.yaml
@@ -1646,6 +1646,59 @@ components:
           description: Test capitalization
           type: string
       type: object
+    TypeHolderDefault:
+      properties:
+        string_item:
+          default: what
+          type: string
+        number_item:
+          type: number
+        integer_item:
+          type: integer
+        bool_item:
+          default: true
+          type: boolean
+        array_item:
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
+    TypeHolderExample:
+      properties:
+        string_item:
+          example: what
+          type: string
+        number_item:
+          example: 1.234
+          type: number
+        integer_item:
+          example: -2
+          type: integer
+        bool_item:
+          example: true
+          type: boolean
+        array_item:
+          example:
+          - 0
+          - 1
+          - 2
+          - 3
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
   securitySchemes:
     petstore_auth:
       flows:
diff --git a/samples/client/petstore/haskell-http-client/tests/Instances.hs b/samples/client/petstore/haskell-http-client/tests/Instances.hs
index 74830f44ba2..fb943387a19 100644
--- a/samples/client/petstore/haskell-http-client/tests/Instances.hs
+++ b/samples/client/petstore/haskell-http-client/tests/Instances.hs
@@ -302,6 +302,24 @@ instance Arbitrary Tag where
       <$> arbitrary -- tagId :: Maybe Integer
       <*> arbitrary -- tagName :: Maybe Text
     
+instance Arbitrary TypeHolderDefault where
+  arbitrary =
+    TypeHolderDefault
+      <$> arbitrary -- typeHolderDefaultStringItem :: Text
+      <*> arbitrary -- typeHolderDefaultNumberItem :: Double
+      <*> arbitrary -- typeHolderDefaultIntegerItem :: Int
+      <*> arbitrary -- typeHolderDefaultBoolItem :: Bool
+      <*> arbitrary -- typeHolderDefaultArrayItem :: [Int]
+    
+instance Arbitrary TypeHolderExample where
+  arbitrary =
+    TypeHolderExample
+      <$> arbitrary -- typeHolderExampleStringItem :: Text
+      <*> arbitrary -- typeHolderExampleNumberItem :: Double
+      <*> arbitrary -- typeHolderExampleIntegerItem :: Int
+      <*> arbitrary -- typeHolderExampleBoolItem :: Bool
+      <*> arbitrary -- typeHolderExampleArrayItem :: [Int]
+    
 instance Arbitrary User where
   arbitrary =
     User
diff --git a/samples/client/petstore/haskell-http-client/tests/Test.hs b/samples/client/petstore/haskell-http-client/tests/Test.hs
index 9d6355d7b71..59bd9f23014 100644
--- a/samples/client/petstore/haskell-http-client/tests/Test.hs
+++ b/samples/client/petstore/haskell-http-client/tests/Test.hs
@@ -53,5 +53,7 @@ main =
       propMimeEq MimeJSON (Proxy :: Proxy ReadOnlyFirst)
       propMimeEq MimeJSON (Proxy :: Proxy SpecialModelName)
       propMimeEq MimeJSON (Proxy :: Proxy Tag)
+      propMimeEq MimeJSON (Proxy :: Proxy TypeHolderDefault)
+      propMimeEq MimeJSON (Proxy :: Proxy TypeHolderExample)
       propMimeEq MimeJSON (Proxy :: Proxy User)
       
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..bb9749d75ac
--- /dev/null
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean isBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..2f817dbcb52
--- /dev/null
+++ b/samples/client/petstore/java/feign/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean isBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..bb9749d75ac
--- /dev/null
+++ b/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean isBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..2f817dbcb52
--- /dev/null
+++ b/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean isBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/google-api-client/docs/TypeHolderDefault.md b/samples/client/petstore/java/google-api-client/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/google-api-client/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/google-api-client/docs/TypeHolderExample.md b/samples/client/petstore/java/google-api-client/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/google-api-client/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..e9410efc213
--- /dev/null
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..66721ce291e
--- /dev/null
+++ b/samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/jersey1/docs/TypeHolderDefault.md b/samples/client/petstore/java/jersey1/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/jersey1/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/jersey1/docs/TypeHolderExample.md b/samples/client/petstore/java/jersey1/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/jersey1/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..e9410efc213
--- /dev/null
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..66721ce291e
--- /dev/null
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/jersey2-java6/docs/TypeHolderDefault.md b/samples/client/petstore/java/jersey2-java6/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/jersey2-java6/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/jersey2-java6/docs/TypeHolderExample.md b/samples/client/petstore/java/jersey2-java6/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/jersey2-java6/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..66dffc1bd81
--- /dev/null
+++ b/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,190 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import org.apache.commons.lang3.ObjectUtils;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean isBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+  if (this == o) {
+    return true;
+  }
+  if (o == null || getClass() != o.getClass()) {
+    return false;
+  }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return ObjectUtils.equals(this.stringItem, typeHolderDefault.stringItem) &&
+    ObjectUtils.equals(this.numberItem, typeHolderDefault.numberItem) &&
+    ObjectUtils.equals(this.integerItem, typeHolderDefault.integerItem) &&
+    ObjectUtils.equals(this.boolItem, typeHolderDefault.boolItem) &&
+    ObjectUtils.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return ObjectUtils.hashCodeMulti(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..e97bbe9d62d
--- /dev/null
+++ b/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,190 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import org.apache.commons.lang3.ObjectUtils;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean isBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+  if (this == o) {
+    return true;
+  }
+  if (o == null || getClass() != o.getClass()) {
+    return false;
+  }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return ObjectUtils.equals(this.stringItem, typeHolderExample.stringItem) &&
+    ObjectUtils.equals(this.numberItem, typeHolderExample.numberItem) &&
+    ObjectUtils.equals(this.integerItem, typeHolderExample.integerItem) &&
+    ObjectUtils.equals(this.boolItem, typeHolderExample.boolItem) &&
+    ObjectUtils.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return ObjectUtils.hashCodeMulti(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/jersey2-java8/docs/TypeHolderDefault.md b/samples/client/petstore/java/jersey2-java8/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/jersey2-java8/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/jersey2-java8/docs/TypeHolderExample.md b/samples/client/petstore/java/jersey2-java8/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/jersey2-java8/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..e092c3fefa4
--- /dev/null
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..f7b337ce0f6
--- /dev/null
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/jersey2/docs/TypeHolderDefault.md b/samples/client/petstore/java/jersey2/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/jersey2/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/jersey2/docs/TypeHolderExample.md b/samples/client/petstore/java/jersey2/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/jersey2/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..e9410efc213
--- /dev/null
+++ b/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..66721ce291e
--- /dev/null
+++ b/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/docs/TypeHolderDefault.md b/samples/client/petstore/java/okhttp-gson-parcelableModel/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/okhttp-gson-parcelableModel/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/docs/TypeHolderExample.md b/samples/client/petstore/java/okhttp-gson-parcelableModel/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/okhttp-gson-parcelableModel/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..836b9164e3d
--- /dev/null
+++ b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,232 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import android.os.Parcelable;
+import android.os.Parcel;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault implements Parcelable {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem = "what";
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem = true;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault() {
+  }
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+
+  public void writeToParcel(Parcel out, int flags) {
+    out.writeValue(stringItem);
+    out.writeValue(numberItem);
+    out.writeValue(integerItem);
+    out.writeValue(boolItem);
+    out.writeValue(arrayItem);
+  }
+
+  TypeHolderDefault(Parcel in) {
+    stringItem = (String)in.readValue(null);
+    numberItem = (BigDecimal)in.readValue(BigDecimal.class.getClassLoader());
+    integerItem = (Integer)in.readValue(null);
+    boolItem = (Boolean)in.readValue(null);
+    arrayItem = (List<Integer>)in.readValue(null);
+  }
+
+  public int describeContents() {
+    return 0;
+  }
+
+  public static final Parcelable.Creator<TypeHolderDefault> CREATOR = new Parcelable.Creator<TypeHolderDefault>() {
+    public TypeHolderDefault createFromParcel(Parcel in) {
+      return new TypeHolderDefault(in);
+    }
+    public TypeHolderDefault[] newArray(int size) {
+      return new TypeHolderDefault[size];
+    }
+  };
+}
+
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..9e8f0b2a101
--- /dev/null
+++ b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,232 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import android.os.Parcelable;
+import android.os.Parcel;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample implements Parcelable {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem;
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample() {
+  }
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+
+  public void writeToParcel(Parcel out, int flags) {
+    out.writeValue(stringItem);
+    out.writeValue(numberItem);
+    out.writeValue(integerItem);
+    out.writeValue(boolItem);
+    out.writeValue(arrayItem);
+  }
+
+  TypeHolderExample(Parcel in) {
+    stringItem = (String)in.readValue(null);
+    numberItem = (BigDecimal)in.readValue(BigDecimal.class.getClassLoader());
+    integerItem = (Integer)in.readValue(null);
+    boolItem = (Boolean)in.readValue(null);
+    arrayItem = (List<Integer>)in.readValue(null);
+  }
+
+  public int describeContents() {
+    return 0;
+  }
+
+  public static final Parcelable.Creator<TypeHolderExample> CREATOR = new Parcelable.Creator<TypeHolderExample>() {
+    public TypeHolderExample createFromParcel(Parcel in) {
+      return new TypeHolderExample(in);
+    }
+    public TypeHolderExample[] newArray(int size) {
+      return new TypeHolderExample[size];
+    }
+  };
+}
+
diff --git a/samples/client/petstore/java/okhttp-gson/docs/TypeHolderDefault.md b/samples/client/petstore/java/okhttp-gson/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/okhttp-gson/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/okhttp-gson/docs/TypeHolderExample.md b/samples/client/petstore/java/okhttp-gson/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/okhttp-gson/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..8b6e71d6b54
--- /dev/null
+++ b/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem = "what";
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem = true;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..f1026fef4fd
--- /dev/null
+++ b/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem;
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/rest-assured/docs/TypeHolderDefault.md b/samples/client/petstore/java/rest-assured/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/rest-assured/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/rest-assured/docs/TypeHolderExample.md b/samples/client/petstore/java/rest-assured/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/rest-assured/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/rest-assured/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/rest-assured/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..f2c9a7531c1
--- /dev/null
+++ b/samples/client/petstore/java/rest-assured/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem = "what";
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem = true;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean isBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/rest-assured/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/rest-assured/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..35e93e546e0
--- /dev/null
+++ b/samples/client/petstore/java/rest-assured/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem;
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean isBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/resteasy/docs/TypeHolderDefault.md b/samples/client/petstore/java/resteasy/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/resteasy/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/resteasy/docs/TypeHolderExample.md b/samples/client/petstore/java/resteasy/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/resteasy/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..e9410efc213
--- /dev/null
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..66721ce291e
--- /dev/null
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/resttemplate-withXml/docs/TypeHolderDefault.md b/samples/client/petstore/java/resttemplate-withXml/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/resttemplate-withXml/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/resttemplate-withXml/docs/TypeHolderExample.md b/samples/client/petstore/java/resttemplate-withXml/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/resttemplate-withXml/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..943ad5ad18b
--- /dev/null
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,208 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.dataformat.xml.annotation.*;
+import javax.xml.bind.annotation.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+@XmlRootElement(name = "TypeHolderDefault")
+@XmlAccessorType(XmlAccessType.FIELD)
+@JacksonXmlRootElement(localName = "TypeHolderDefault")
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  @JacksonXmlProperty(localName = "string_item")
+  @XmlElement(name = "string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  @JacksonXmlProperty(localName = "number_item")
+  @XmlElement(name = "number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  @JacksonXmlProperty(localName = "integer_item")
+  @XmlElement(name = "integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  @JacksonXmlProperty(localName = "bool_item")
+  @XmlElement(name = "bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  // Is a container wrapped=false
+  // items.name=arrayItem items.baseName=arrayItem items.xmlName= items.xmlNamespace=
+  // items.example= items.type=Integer
+  @XmlElement(name = "arrayItem")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..d85918c3fbf
--- /dev/null
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,208 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.dataformat.xml.annotation.*;
+import javax.xml.bind.annotation.*;
+
+/**
+ * TypeHolderExample
+ */
+
+@XmlRootElement(name = "TypeHolderExample")
+@XmlAccessorType(XmlAccessType.FIELD)
+@JacksonXmlRootElement(localName = "TypeHolderExample")
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  @JacksonXmlProperty(localName = "string_item")
+  @XmlElement(name = "string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  @JacksonXmlProperty(localName = "number_item")
+  @XmlElement(name = "number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  @JacksonXmlProperty(localName = "integer_item")
+  @XmlElement(name = "integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  @JacksonXmlProperty(localName = "bool_item")
+  @XmlElement(name = "bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  // Is a container wrapped=false
+  // items.name=arrayItem items.baseName=arrayItem items.xmlName= items.xmlNamespace=
+  // items.example= items.type=Integer
+  @XmlElement(name = "arrayItem")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/resttemplate/docs/TypeHolderDefault.md b/samples/client/petstore/java/resttemplate/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/resttemplate/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/resttemplate/docs/TypeHolderExample.md b/samples/client/petstore/java/resttemplate/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/resttemplate/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..e9410efc213
--- /dev/null
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..66721ce291e
--- /dev/null
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/retrofit/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..8b6e71d6b54
--- /dev/null
+++ b/samples/client/petstore/java/retrofit/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem = "what";
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem = true;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/retrofit/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..f1026fef4fd
--- /dev/null
+++ b/samples/client/petstore/java/retrofit/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem;
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2-play24/docs/TypeHolderDefault.md b/samples/client/petstore/java/retrofit2-play24/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play24/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2-play24/docs/TypeHolderExample.md b/samples/client/petstore/java/retrofit2-play24/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play24/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..8ae4ccf5787
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @NotNull
+  @Valid
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..03334b7e47f
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @NotNull
+  @Valid
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2-play25/docs/TypeHolderDefault.md b/samples/client/petstore/java/retrofit2-play25/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play25/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2-play25/docs/TypeHolderExample.md b/samples/client/petstore/java/retrofit2-play25/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play25/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..8ae4ccf5787
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @NotNull
+  @Valid
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..03334b7e47f
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @NotNull
+  @Valid
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2-play26/docs/TypeHolderDefault.md b/samples/client/petstore/java/retrofit2-play26/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play26/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2-play26/docs/TypeHolderExample.md b/samples/client/petstore/java/retrofit2-play26/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play26/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..8ae4ccf5787
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @NotNull
+  @Valid
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @NotNull
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..03334b7e47f
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @NotNull
+  @Valid
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @NotNull
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2/docs/TypeHolderDefault.md b/samples/client/petstore/java/retrofit2/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2/docs/TypeHolderExample.md b/samples/client/petstore/java/retrofit2/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..8b6e71d6b54
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem = "what";
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem = true;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..f1026fef4fd
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem;
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2rx/docs/TypeHolderDefault.md b/samples/client/petstore/java/retrofit2rx/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2rx/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2rx/docs/TypeHolderExample.md b/samples/client/petstore/java/retrofit2rx/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2rx/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..8b6e71d6b54
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem = "what";
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem = true;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..f1026fef4fd
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem;
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2rx2/docs/TypeHolderDefault.md b/samples/client/petstore/java/retrofit2rx2/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2rx2/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2rx2/docs/TypeHolderExample.md b/samples/client/petstore/java/retrofit2rx2/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2rx2/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..8b6e71d6b54
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem = "what";
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem = true;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..f1026fef4fd
--- /dev/null
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,199 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  public static final String SERIALIZED_NAME_STRING_ITEM = "string_item";
+  @SerializedName(SERIALIZED_NAME_STRING_ITEM)
+  private String stringItem;
+
+  public static final String SERIALIZED_NAME_NUMBER_ITEM = "number_item";
+  @SerializedName(SERIALIZED_NAME_NUMBER_ITEM)
+  private BigDecimal numberItem;
+
+  public static final String SERIALIZED_NAME_INTEGER_ITEM = "integer_item";
+  @SerializedName(SERIALIZED_NAME_INTEGER_ITEM)
+  private Integer integerItem;
+
+  public static final String SERIALIZED_NAME_BOOL_ITEM = "bool_item";
+  @SerializedName(SERIALIZED_NAME_BOOL_ITEM)
+  private Boolean boolItem;
+
+  public static final String SERIALIZED_NAME_ARRAY_ITEM = "array_item";
+  @SerializedName(SERIALIZED_NAME_ARRAY_ITEM)
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/vertx/docs/TypeHolderDefault.md b/samples/client/petstore/java/vertx/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/vertx/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/vertx/docs/TypeHolderExample.md b/samples/client/petstore/java/vertx/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/vertx/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..e092c3fefa4
--- /dev/null
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..f7b337ce0f6
--- /dev/null
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/webclient/docs/TypeHolderDefault.md b/samples/client/petstore/java/webclient/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..cc1a78ba7ea
--- /dev/null
+++ b/samples/client/petstore/java/webclient/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/webclient/docs/TypeHolderExample.md b/samples/client/petstore/java/webclient/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..77921795270
--- /dev/null
+++ b/samples/client/petstore/java/webclient/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**stringItem** | **String** |  | 
+**numberItem** | [**BigDecimal**](BigDecimal.md) |  | 
+**integerItem** | **Integer** |  | 
+**boolItem** | **Boolean** |  | 
+**arrayItem** | **List&lt;Integer&gt;** |  | 
+
+
+
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderDefault.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..e092c3fefa4
--- /dev/null
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderDefault.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderExample.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderExample.java
new file mode 100644
index 00000000000..f7b337ce0f6
--- /dev/null
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/model/TypeHolderExample.java
@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @ApiModelProperty(example = "what", required = true, value = "")
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @ApiModelProperty(example = "true", required = true, value = "")
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+
diff --git a/samples/client/petstore/php/OpenAPIClient-php/README.md b/samples/client/petstore/php/OpenAPIClient-php/README.md
index c97a52feb07..4b1b7004d25 100644
--- a/samples/client/petstore/php/OpenAPIClient-php/README.md
+++ b/samples/client/petstore/php/OpenAPIClient-php/README.md
@@ -151,6 +151,8 @@ Class | Method | HTTP request | Description
  - [ReadOnlyFirst](docs/Model/ReadOnlyFirst.md)
  - [SpecialModelName](docs/Model/SpecialModelName.md)
  - [Tag](docs/Model/Tag.md)
+ - [TypeHolderDefault](docs/Model/TypeHolderDefault.md)
+ - [TypeHolderExample](docs/Model/TypeHolderExample.md)
  - [User](docs/Model/User.md)
 
 
diff --git a/samples/client/petstore/php/OpenAPIClient-php/docs/Model/TypeHolderDefault.md b/samples/client/petstore/php/OpenAPIClient-php/docs/Model/TypeHolderDefault.md
new file mode 100644
index 00000000000..b03925fa9ce
--- /dev/null
+++ b/samples/client/petstore/php/OpenAPIClient-php/docs/Model/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**string_item** | **string** |  | [default to 'what']
+**number_item** | **float** |  | 
+**integer_item** | **int** |  | 
+**bool_item** | **bool** |  | [default to true]
+**array_item** | **int[]** |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/samples/client/petstore/php/OpenAPIClient-php/docs/Model/TypeHolderExample.md b/samples/client/petstore/php/OpenAPIClient-php/docs/Model/TypeHolderExample.md
new file mode 100644
index 00000000000..07fb85843da
--- /dev/null
+++ b/samples/client/petstore/php/OpenAPIClient-php/docs/Model/TypeHolderExample.md
@@ -0,0 +1,14 @@
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**string_item** | **string** |  | 
+**number_item** | **float** |  | 
+**integer_item** | **int** |  | 
+**bool_item** | **bool** |  | 
+**array_item** | **int[]** |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/samples/client/petstore/php/OpenAPIClient-php/lib/Model/TypeHolderDefault.php b/samples/client/petstore/php/OpenAPIClient-php/lib/Model/TypeHolderDefault.php
new file mode 100644
index 00000000000..d5d4b99ade6
--- /dev/null
+++ b/samples/client/petstore/php/OpenAPIClient-php/lib/Model/TypeHolderDefault.php
@@ -0,0 +1,432 @@
+<?php
+/**
+ * TypeHolderDefault
+ *
+ * PHP version 5
+ *
+ * @category Class
+ * @package  OpenAPI\Client
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+
+/**
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ * OpenAPI Generator version: 4.0.0-SNAPSHOT
+ */
+
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+namespace OpenAPI\Client\Model;
+
+use \ArrayAccess;
+use \OpenAPI\Client\ObjectSerializer;
+
+/**
+ * TypeHolderDefault Class Doc Comment
+ *
+ * @category Class
+ * @package  OpenAPI\Client
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+class TypeHolderDefault implements ModelInterface, ArrayAccess
+{
+    const DISCRIMINATOR = null;
+
+    /**
+      * The original name of the model.
+      *
+      * @var string
+      */
+    protected static $openAPIModelName = 'TypeHolderDefault';
+
+    /**
+      * Array of property to type mappings. Used for (de)serialization
+      *
+      * @var string[]
+      */
+    protected static $openAPITypes = [
+        'string_item' => 'string',
+        'number_item' => 'float',
+        'integer_item' => 'int',
+        'bool_item' => 'bool',
+        'array_item' => 'int[]'
+    ];
+
+    /**
+      * Array of property to format mappings. Used for (de)serialization
+      *
+      * @var string[]
+      */
+    protected static $openAPIFormats = [
+        'string_item' => null,
+        'number_item' => null,
+        'integer_item' => null,
+        'bool_item' => null,
+        'array_item' => null
+    ];
+
+    /**
+     * Array of property to type mappings. Used for (de)serialization
+     *
+     * @return array
+     */
+    public static function openAPITypes()
+    {
+        return self::$openAPITypes;
+    }
+
+    /**
+     * Array of property to format mappings. Used for (de)serialization
+     *
+     * @return array
+     */
+    public static function openAPIFormats()
+    {
+        return self::$openAPIFormats;
+    }
+
+    /**
+     * Array of attributes where the key is the local name,
+     * and the value is the original name
+     *
+     * @var string[]
+     */
+    protected static $attributeMap = [
+        'string_item' => 'string_item',
+        'number_item' => 'number_item',
+        'integer_item' => 'integer_item',
+        'bool_item' => 'bool_item',
+        'array_item' => 'array_item'
+    ];
+
+    /**
+     * Array of attributes to setter functions (for deserialization of responses)
+     *
+     * @var string[]
+     */
+    protected static $setters = [
+        'string_item' => 'setStringItem',
+        'number_item' => 'setNumberItem',
+        'integer_item' => 'setIntegerItem',
+        'bool_item' => 'setBoolItem',
+        'array_item' => 'setArrayItem'
+    ];
+
+    /**
+     * Array of attributes to getter functions (for serialization of requests)
+     *
+     * @var string[]
+     */
+    protected static $getters = [
+        'string_item' => 'getStringItem',
+        'number_item' => 'getNumberItem',
+        'integer_item' => 'getIntegerItem',
+        'bool_item' => 'getBoolItem',
+        'array_item' => 'getArrayItem'
+    ];
+
+    /**
+     * Array of attributes where the key is the local name,
+     * and the value is the original name
+     *
+     * @return array
+     */
+    public static function attributeMap()
+    {
+        return self::$attributeMap;
+    }
+
+    /**
+     * Array of attributes to setter functions (for deserialization of responses)
+     *
+     * @return array
+     */
+    public static function setters()
+    {
+        return self::$setters;
+    }
+
+    /**
+     * Array of attributes to getter functions (for serialization of requests)
+     *
+     * @return array
+     */
+    public static function getters()
+    {
+        return self::$getters;
+    }
+
+    /**
+     * The original name of the model.
+     *
+     * @return string
+     */
+    public function getModelName()
+    {
+        return self::$openAPIModelName;
+    }
+
+    
+
+    
+
+    /**
+     * Associative array for storing property values
+     *
+     * @var mixed[]
+     */
+    protected $container = [];
+
+    /**
+     * Constructor
+     *
+     * @param mixed[] $data Associated array of property values
+     *                      initializing the model
+     */
+    public function __construct(array $data = null)
+    {
+        $this->container['string_item'] = isset($data['string_item']) ? $data['string_item'] : 'what';
+        $this->container['number_item'] = isset($data['number_item']) ? $data['number_item'] : null;
+        $this->container['integer_item'] = isset($data['integer_item']) ? $data['integer_item'] : null;
+        $this->container['bool_item'] = isset($data['bool_item']) ? $data['bool_item'] : true;
+        $this->container['array_item'] = isset($data['array_item']) ? $data['array_item'] : null;
+    }
+
+    /**
+     * Show all the invalid properties with reasons.
+     *
+     * @return array invalid properties with reasons
+     */
+    public function listInvalidProperties()
+    {
+        $invalidProperties = [];
+
+        if ($this->container['string_item'] === null) {
+            $invalidProperties[] = "'string_item' can't be null";
+        }
+        if ($this->container['number_item'] === null) {
+            $invalidProperties[] = "'number_item' can't be null";
+        }
+        if ($this->container['integer_item'] === null) {
+            $invalidProperties[] = "'integer_item' can't be null";
+        }
+        if ($this->container['bool_item'] === null) {
+            $invalidProperties[] = "'bool_item' can't be null";
+        }
+        if ($this->container['array_item'] === null) {
+            $invalidProperties[] = "'array_item' can't be null";
+        }
+        return $invalidProperties;
+    }
+
+    /**
+     * Validate all the properties in the model
+     * return true if all passed
+     *
+     * @return bool True if all properties are valid
+     */
+    public function valid()
+    {
+        return count($this->listInvalidProperties()) === 0;
+    }
+
+
+    /**
+     * Gets string_item
+     *
+     * @return string
+     */
+    public function getStringItem()
+    {
+        return $this->container['string_item'];
+    }
+
+    /**
+     * Sets string_item
+     *
+     * @param string $string_item string_item
+     *
+     * @return $this
+     */
+    public function setStringItem($string_item)
+    {
+        $this->container['string_item'] = $string_item;
+
+        return $this;
+    }
+
+    /**
+     * Gets number_item
+     *
+     * @return float
+     */
+    public function getNumberItem()
+    {
+        return $this->container['number_item'];
+    }
+
+    /**
+     * Sets number_item
+     *
+     * @param float $number_item number_item
+     *
+     * @return $this
+     */
+    public function setNumberItem($number_item)
+    {
+        $this->container['number_item'] = $number_item;
+
+        return $this;
+    }
+
+    /**
+     * Gets integer_item
+     *
+     * @return int
+     */
+    public function getIntegerItem()
+    {
+        return $this->container['integer_item'];
+    }
+
+    /**
+     * Sets integer_item
+     *
+     * @param int $integer_item integer_item
+     *
+     * @return $this
+     */
+    public function setIntegerItem($integer_item)
+    {
+        $this->container['integer_item'] = $integer_item;
+
+        return $this;
+    }
+
+    /**
+     * Gets bool_item
+     *
+     * @return bool
+     */
+    public function getBoolItem()
+    {
+        return $this->container['bool_item'];
+    }
+
+    /**
+     * Sets bool_item
+     *
+     * @param bool $bool_item bool_item
+     *
+     * @return $this
+     */
+    public function setBoolItem($bool_item)
+    {
+        $this->container['bool_item'] = $bool_item;
+
+        return $this;
+    }
+
+    /**
+     * Gets array_item
+     *
+     * @return int[]
+     */
+    public function getArrayItem()
+    {
+        return $this->container['array_item'];
+    }
+
+    /**
+     * Sets array_item
+     *
+     * @param int[] $array_item array_item
+     *
+     * @return $this
+     */
+    public function setArrayItem($array_item)
+    {
+        $this->container['array_item'] = $array_item;
+
+        return $this;
+    }
+    /**
+     * Returns true if offset exists. False otherwise.
+     *
+     * @param integer $offset Offset
+     *
+     * @return boolean
+     */
+    public function offsetExists($offset)
+    {
+        return isset($this->container[$offset]);
+    }
+
+    /**
+     * Gets offset.
+     *
+     * @param integer $offset Offset
+     *
+     * @return mixed
+     */
+    public function offsetGet($offset)
+    {
+        return isset($this->container[$offset]) ? $this->container[$offset] : null;
+    }
+
+    /**
+     * Sets value based on offset.
+     *
+     * @param integer $offset Offset
+     * @param mixed   $value  Value to be set
+     *
+     * @return void
+     */
+    public function offsetSet($offset, $value)
+    {
+        if (is_null($offset)) {
+            $this->container[] = $value;
+        } else {
+            $this->container[$offset] = $value;
+        }
+    }
+
+    /**
+     * Unsets offset.
+     *
+     * @param integer $offset Offset
+     *
+     * @return void
+     */
+    public function offsetUnset($offset)
+    {
+        unset($this->container[$offset]);
+    }
+
+    /**
+     * Gets the string presentation of the object
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return json_encode(
+            ObjectSerializer::sanitizeForSerialization($this),
+            JSON_PRETTY_PRINT
+        );
+    }
+}
+
+
diff --git a/samples/client/petstore/php/OpenAPIClient-php/lib/Model/TypeHolderExample.php b/samples/client/petstore/php/OpenAPIClient-php/lib/Model/TypeHolderExample.php
new file mode 100644
index 00000000000..688c48bcd1c
--- /dev/null
+++ b/samples/client/petstore/php/OpenAPIClient-php/lib/Model/TypeHolderExample.php
@@ -0,0 +1,432 @@
+<?php
+/**
+ * TypeHolderExample
+ *
+ * PHP version 5
+ *
+ * @category Class
+ * @package  OpenAPI\Client
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+
+/**
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ * OpenAPI Generator version: 4.0.0-SNAPSHOT
+ */
+
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+namespace OpenAPI\Client\Model;
+
+use \ArrayAccess;
+use \OpenAPI\Client\ObjectSerializer;
+
+/**
+ * TypeHolderExample Class Doc Comment
+ *
+ * @category Class
+ * @package  OpenAPI\Client
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+class TypeHolderExample implements ModelInterface, ArrayAccess
+{
+    const DISCRIMINATOR = null;
+
+    /**
+      * The original name of the model.
+      *
+      * @var string
+      */
+    protected static $openAPIModelName = 'TypeHolderExample';
+
+    /**
+      * Array of property to type mappings. Used for (de)serialization
+      *
+      * @var string[]
+      */
+    protected static $openAPITypes = [
+        'string_item' => 'string',
+        'number_item' => 'float',
+        'integer_item' => 'int',
+        'bool_item' => 'bool',
+        'array_item' => 'int[]'
+    ];
+
+    /**
+      * Array of property to format mappings. Used for (de)serialization
+      *
+      * @var string[]
+      */
+    protected static $openAPIFormats = [
+        'string_item' => null,
+        'number_item' => null,
+        'integer_item' => null,
+        'bool_item' => null,
+        'array_item' => null
+    ];
+
+    /**
+     * Array of property to type mappings. Used for (de)serialization
+     *
+     * @return array
+     */
+    public static function openAPITypes()
+    {
+        return self::$openAPITypes;
+    }
+
+    /**
+     * Array of property to format mappings. Used for (de)serialization
+     *
+     * @return array
+     */
+    public static function openAPIFormats()
+    {
+        return self::$openAPIFormats;
+    }
+
+    /**
+     * Array of attributes where the key is the local name,
+     * and the value is the original name
+     *
+     * @var string[]
+     */
+    protected static $attributeMap = [
+        'string_item' => 'string_item',
+        'number_item' => 'number_item',
+        'integer_item' => 'integer_item',
+        'bool_item' => 'bool_item',
+        'array_item' => 'array_item'
+    ];
+
+    /**
+     * Array of attributes to setter functions (for deserialization of responses)
+     *
+     * @var string[]
+     */
+    protected static $setters = [
+        'string_item' => 'setStringItem',
+        'number_item' => 'setNumberItem',
+        'integer_item' => 'setIntegerItem',
+        'bool_item' => 'setBoolItem',
+        'array_item' => 'setArrayItem'
+    ];
+
+    /**
+     * Array of attributes to getter functions (for serialization of requests)
+     *
+     * @var string[]
+     */
+    protected static $getters = [
+        'string_item' => 'getStringItem',
+        'number_item' => 'getNumberItem',
+        'integer_item' => 'getIntegerItem',
+        'bool_item' => 'getBoolItem',
+        'array_item' => 'getArrayItem'
+    ];
+
+    /**
+     * Array of attributes where the key is the local name,
+     * and the value is the original name
+     *
+     * @return array
+     */
+    public static function attributeMap()
+    {
+        return self::$attributeMap;
+    }
+
+    /**
+     * Array of attributes to setter functions (for deserialization of responses)
+     *
+     * @return array
+     */
+    public static function setters()
+    {
+        return self::$setters;
+    }
+
+    /**
+     * Array of attributes to getter functions (for serialization of requests)
+     *
+     * @return array
+     */
+    public static function getters()
+    {
+        return self::$getters;
+    }
+
+    /**
+     * The original name of the model.
+     *
+     * @return string
+     */
+    public function getModelName()
+    {
+        return self::$openAPIModelName;
+    }
+
+    
+
+    
+
+    /**
+     * Associative array for storing property values
+     *
+     * @var mixed[]
+     */
+    protected $container = [];
+
+    /**
+     * Constructor
+     *
+     * @param mixed[] $data Associated array of property values
+     *                      initializing the model
+     */
+    public function __construct(array $data = null)
+    {
+        $this->container['string_item'] = isset($data['string_item']) ? $data['string_item'] : null;
+        $this->container['number_item'] = isset($data['number_item']) ? $data['number_item'] : null;
+        $this->container['integer_item'] = isset($data['integer_item']) ? $data['integer_item'] : null;
+        $this->container['bool_item'] = isset($data['bool_item']) ? $data['bool_item'] : null;
+        $this->container['array_item'] = isset($data['array_item']) ? $data['array_item'] : null;
+    }
+
+    /**
+     * Show all the invalid properties with reasons.
+     *
+     * @return array invalid properties with reasons
+     */
+    public function listInvalidProperties()
+    {
+        $invalidProperties = [];
+
+        if ($this->container['string_item'] === null) {
+            $invalidProperties[] = "'string_item' can't be null";
+        }
+        if ($this->container['number_item'] === null) {
+            $invalidProperties[] = "'number_item' can't be null";
+        }
+        if ($this->container['integer_item'] === null) {
+            $invalidProperties[] = "'integer_item' can't be null";
+        }
+        if ($this->container['bool_item'] === null) {
+            $invalidProperties[] = "'bool_item' can't be null";
+        }
+        if ($this->container['array_item'] === null) {
+            $invalidProperties[] = "'array_item' can't be null";
+        }
+        return $invalidProperties;
+    }
+
+    /**
+     * Validate all the properties in the model
+     * return true if all passed
+     *
+     * @return bool True if all properties are valid
+     */
+    public function valid()
+    {
+        return count($this->listInvalidProperties()) === 0;
+    }
+
+
+    /**
+     * Gets string_item
+     *
+     * @return string
+     */
+    public function getStringItem()
+    {
+        return $this->container['string_item'];
+    }
+
+    /**
+     * Sets string_item
+     *
+     * @param string $string_item string_item
+     *
+     * @return $this
+     */
+    public function setStringItem($string_item)
+    {
+        $this->container['string_item'] = $string_item;
+
+        return $this;
+    }
+
+    /**
+     * Gets number_item
+     *
+     * @return float
+     */
+    public function getNumberItem()
+    {
+        return $this->container['number_item'];
+    }
+
+    /**
+     * Sets number_item
+     *
+     * @param float $number_item number_item
+     *
+     * @return $this
+     */
+    public function setNumberItem($number_item)
+    {
+        $this->container['number_item'] = $number_item;
+
+        return $this;
+    }
+
+    /**
+     * Gets integer_item
+     *
+     * @return int
+     */
+    public function getIntegerItem()
+    {
+        return $this->container['integer_item'];
+    }
+
+    /**
+     * Sets integer_item
+     *
+     * @param int $integer_item integer_item
+     *
+     * @return $this
+     */
+    public function setIntegerItem($integer_item)
+    {
+        $this->container['integer_item'] = $integer_item;
+
+        return $this;
+    }
+
+    /**
+     * Gets bool_item
+     *
+     * @return bool
+     */
+    public function getBoolItem()
+    {
+        return $this->container['bool_item'];
+    }
+
+    /**
+     * Sets bool_item
+     *
+     * @param bool $bool_item bool_item
+     *
+     * @return $this
+     */
+    public function setBoolItem($bool_item)
+    {
+        $this->container['bool_item'] = $bool_item;
+
+        return $this;
+    }
+
+    /**
+     * Gets array_item
+     *
+     * @return int[]
+     */
+    public function getArrayItem()
+    {
+        return $this->container['array_item'];
+    }
+
+    /**
+     * Sets array_item
+     *
+     * @param int[] $array_item array_item
+     *
+     * @return $this
+     */
+    public function setArrayItem($array_item)
+    {
+        $this->container['array_item'] = $array_item;
+
+        return $this;
+    }
+    /**
+     * Returns true if offset exists. False otherwise.
+     *
+     * @param integer $offset Offset
+     *
+     * @return boolean
+     */
+    public function offsetExists($offset)
+    {
+        return isset($this->container[$offset]);
+    }
+
+    /**
+     * Gets offset.
+     *
+     * @param integer $offset Offset
+     *
+     * @return mixed
+     */
+    public function offsetGet($offset)
+    {
+        return isset($this->container[$offset]) ? $this->container[$offset] : null;
+    }
+
+    /**
+     * Sets value based on offset.
+     *
+     * @param integer $offset Offset
+     * @param mixed   $value  Value to be set
+     *
+     * @return void
+     */
+    public function offsetSet($offset, $value)
+    {
+        if (is_null($offset)) {
+            $this->container[] = $value;
+        } else {
+            $this->container[$offset] = $value;
+        }
+    }
+
+    /**
+     * Unsets offset.
+     *
+     * @param integer $offset Offset
+     *
+     * @return void
+     */
+    public function offsetUnset($offset)
+    {
+        unset($this->container[$offset]);
+    }
+
+    /**
+     * Gets the string presentation of the object
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return json_encode(
+            ObjectSerializer::sanitizeForSerialization($this),
+            JSON_PRETTY_PRINT
+        );
+    }
+}
+
+
diff --git a/samples/client/petstore/php/OpenAPIClient-php/test/Model/TypeHolderDefaultTest.php b/samples/client/petstore/php/OpenAPIClient-php/test/Model/TypeHolderDefaultTest.php
new file mode 100644
index 00000000000..641c0220c8b
--- /dev/null
+++ b/samples/client/petstore/php/OpenAPIClient-php/test/Model/TypeHolderDefaultTest.php
@@ -0,0 +1,115 @@
+<?php
+/**
+ * TypeHolderDefaultTest
+ *
+ * PHP version 5
+ *
+ * @category Class
+ * @package  OpenAPI\Client
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+
+/**
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ * OpenAPI Generator version: 4.0.0-SNAPSHOT
+ */
+
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Please update the test case below to test the model.
+ */
+
+namespace OpenAPI\Client;
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * TypeHolderDefaultTest Class Doc Comment
+ *
+ * @category    Class
+ * @description TypeHolderDefault
+ * @package     OpenAPI\Client
+ * @author      OpenAPI Generator team
+ * @link        https://openapi-generator.tech
+ */
+class TypeHolderDefaultTest extends TestCase
+{
+
+    /**
+     * Setup before running any test case
+     */
+    public static function setUpBeforeClass()
+    {
+    }
+
+    /**
+     * Setup before running each test case
+     */
+    public function setUp()
+    {
+    }
+
+    /**
+     * Clean up after running each test case
+     */
+    public function tearDown()
+    {
+    }
+
+    /**
+     * Clean up after running all test cases
+     */
+    public static function tearDownAfterClass()
+    {
+    }
+
+    /**
+     * Test "TypeHolderDefault"
+     */
+    public function testTypeHolderDefault()
+    {
+    }
+
+    /**
+     * Test attribute "string_item"
+     */
+    public function testPropertyStringItem()
+    {
+    }
+
+    /**
+     * Test attribute "number_item"
+     */
+    public function testPropertyNumberItem()
+    {
+    }
+
+    /**
+     * Test attribute "integer_item"
+     */
+    public function testPropertyIntegerItem()
+    {
+    }
+
+    /**
+     * Test attribute "bool_item"
+     */
+    public function testPropertyBoolItem()
+    {
+    }
+
+    /**
+     * Test attribute "array_item"
+     */
+    public function testPropertyArrayItem()
+    {
+    }
+}
diff --git a/samples/client/petstore/php/OpenAPIClient-php/test/Model/TypeHolderExampleTest.php b/samples/client/petstore/php/OpenAPIClient-php/test/Model/TypeHolderExampleTest.php
new file mode 100644
index 00000000000..9d2dbe6c45c
--- /dev/null
+++ b/samples/client/petstore/php/OpenAPIClient-php/test/Model/TypeHolderExampleTest.php
@@ -0,0 +1,115 @@
+<?php
+/**
+ * TypeHolderExampleTest
+ *
+ * PHP version 5
+ *
+ * @category Class
+ * @package  OpenAPI\Client
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+
+/**
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ * Generated by: https://openapi-generator.tech
+ * OpenAPI Generator version: 4.0.0-SNAPSHOT
+ */
+
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Please update the test case below to test the model.
+ */
+
+namespace OpenAPI\Client;
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * TypeHolderExampleTest Class Doc Comment
+ *
+ * @category    Class
+ * @description TypeHolderExample
+ * @package     OpenAPI\Client
+ * @author      OpenAPI Generator team
+ * @link        https://openapi-generator.tech
+ */
+class TypeHolderExampleTest extends TestCase
+{
+
+    /**
+     * Setup before running any test case
+     */
+    public static function setUpBeforeClass()
+    {
+    }
+
+    /**
+     * Setup before running each test case
+     */
+    public function setUp()
+    {
+    }
+
+    /**
+     * Clean up after running each test case
+     */
+    public function tearDown()
+    {
+    }
+
+    /**
+     * Clean up after running all test cases
+     */
+    public static function tearDownAfterClass()
+    {
+    }
+
+    /**
+     * Test "TypeHolderExample"
+     */
+    public function testTypeHolderExample()
+    {
+    }
+
+    /**
+     * Test attribute "string_item"
+     */
+    public function testPropertyStringItem()
+    {
+    }
+
+    /**
+     * Test attribute "number_item"
+     */
+    public function testPropertyNumberItem()
+    {
+    }
+
+    /**
+     * Test attribute "integer_item"
+     */
+    public function testPropertyIntegerItem()
+    {
+    }
+
+    /**
+     * Test attribute "bool_item"
+     */
+    public function testPropertyBoolItem()
+    {
+    }
+
+    /**
+     * Test attribute "array_item"
+     */
+    public function testPropertyArrayItem()
+    {
+    }
+}
diff --git a/samples/client/petstore/python/README.md b/samples/client/petstore/python/README.md
index 05c64828c81..865a13a5508 100644
--- a/samples/client/petstore/python/README.md
+++ b/samples/client/petstore/python/README.md
@@ -53,11 +53,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.AnotherFakeApi(petstore_api.ApiClient(configuration))
-client = petstore_api.Client() # Client | client model
+body = petstore_api.Client() # Client | client model
 
 try:
     # To test special tags
-    api_response = api_instance.call_123_test_special_tags(client)
+    api_response = api_instance.call_123_test_special_tags(body)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AnotherFakeApi->call_123_test_special_tags: %s\n" % e)
@@ -142,6 +142,8 @@ Class | Method | HTTP request | Description
  - [ReadOnlyFirst](docs/ReadOnlyFirst.md)
  - [SpecialModelName](docs/SpecialModelName.md)
  - [Tag](docs/Tag.md)
+ - [TypeHolderDefault](docs/TypeHolderDefault.md)
+ - [TypeHolderExample](docs/TypeHolderExample.md)
  - [User](docs/User.md)
 
 
diff --git a/samples/client/petstore/python/docs/AnotherFakeApi.md b/samples/client/petstore/python/docs/AnotherFakeApi.md
index 447ce3edde3..53d8da58f0c 100644
--- a/samples/client/petstore/python/docs/AnotherFakeApi.md
+++ b/samples/client/petstore/python/docs/AnotherFakeApi.md
@@ -8,7 +8,7 @@ Method | HTTP request | Description
 
 
 # **call_123_test_special_tags**
-> Client call_123_test_special_tags(client)
+> Client call_123_test_special_tags(body)
 
 To test special tags
 
@@ -24,11 +24,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.AnotherFakeApi()
-client = petstore_api.Client() # Client | client model
+body = petstore_api.Client() # Client | client model
 
 try:
     # To test special tags
-    api_response = api_instance.call_123_test_special_tags(client)
+    api_response = api_instance.call_123_test_special_tags(body)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling AnotherFakeApi->call_123_test_special_tags: %s\n" % e)
@@ -38,7 +38,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **client** | [**Client**](Client.md)| client model | 
+ **body** | [**Client**](Client.md)| client model | 
 
 ### Return type
 
diff --git a/samples/client/petstore/python/docs/FakeApi.md b/samples/client/petstore/python/docs/FakeApi.md
index 97dc3c892e0..0179be2f3d4 100644
--- a/samples/client/petstore/python/docs/FakeApi.md
+++ b/samples/client/petstore/python/docs/FakeApi.md
@@ -66,7 +66,7 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **fake_outer_composite_serialize**
-> OuterComposite fake_outer_composite_serialize(outer_composite=outer_composite)
+> OuterComposite fake_outer_composite_serialize(body=body)
 
 
 
@@ -82,10 +82,10 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.FakeApi()
-outer_composite = petstore_api.OuterComposite() # OuterComposite | Input composite as post body (optional)
+body = petstore_api.OuterComposite() # OuterComposite | Input composite as post body (optional)
 
 try:
-    api_response = api_instance.fake_outer_composite_serialize(outer_composite=outer_composite)
+    api_response = api_instance.fake_outer_composite_serialize(body=body)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FakeApi->fake_outer_composite_serialize: %s\n" % e)
@@ -95,7 +95,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **outer_composite** | [**OuterComposite**](OuterComposite.md)| Input composite as post body | [optional] 
+ **body** | [**OuterComposite**](OuterComposite.md)| Input composite as post body | [optional] 
 
 ### Return type
 
@@ -207,7 +207,7 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **test_body_with_file_schema**
-> test_body_with_file_schema(file_schema_test_class)
+> test_body_with_file_schema(body)
 
 
 
@@ -223,10 +223,10 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.FakeApi()
-file_schema_test_class = petstore_api.FileSchemaTestClass() # FileSchemaTestClass | 
+body = petstore_api.FileSchemaTestClass() # FileSchemaTestClass | 
 
 try:
-    api_instance.test_body_with_file_schema(file_schema_test_class)
+    api_instance.test_body_with_file_schema(body)
 except ApiException as e:
     print("Exception when calling FakeApi->test_body_with_file_schema: %s\n" % e)
 ```
@@ -235,7 +235,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **file_schema_test_class** | [**FileSchemaTestClass**](FileSchemaTestClass.md)|  | 
+ **body** | [**FileSchemaTestClass**](FileSchemaTestClass.md)|  | 
 
 ### Return type
 
@@ -253,7 +253,7 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **test_body_with_query_params**
-> test_body_with_query_params(query, user)
+> test_body_with_query_params(query, body)
 
 
 
@@ -268,10 +268,10 @@ from pprint import pprint
 # create an instance of the API class
 api_instance = petstore_api.FakeApi()
 query = 'query_example' # str | 
-user = petstore_api.User() # User | 
+body = petstore_api.User() # User | 
 
 try:
-    api_instance.test_body_with_query_params(query, user)
+    api_instance.test_body_with_query_params(query, body)
 except ApiException as e:
     print("Exception when calling FakeApi->test_body_with_query_params: %s\n" % e)
 ```
@@ -281,7 +281,7 @@ except ApiException as e:
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **query** | **str**|  | 
- **user** | [**User**](User.md)|  | 
+ **body** | [**User**](User.md)|  | 
 
 ### Return type
 
@@ -299,7 +299,7 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **test_client_model**
-> Client test_client_model(client)
+> Client test_client_model(body)
 
 To test \"client\" model
 
@@ -315,11 +315,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.FakeApi()
-client = petstore_api.Client() # Client | client model
+body = petstore_api.Client() # Client | client model
 
 try:
     # To test \"client\" model
-    api_response = api_instance.test_client_model(client)
+    api_response = api_instance.test_client_model(body)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FakeApi->test_client_model: %s\n" % e)
@@ -329,7 +329,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **client** | [**Client**](Client.md)| client model | 
+ **body** | [**Client**](Client.md)| client model | 
 
 ### Return type
 
@@ -545,7 +545,7 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **test_inline_additional_properties**
-> test_inline_additional_properties(request_body)
+> test_inline_additional_properties(param)
 
 test inline additionalProperties
 
@@ -559,11 +559,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.FakeApi()
-request_body = {'key': 'request_body_example'} # dict(str, str) | request body
+param = {'key': 'param_example'} # dict(str, str) | request body
 
 try:
     # test inline additionalProperties
-    api_instance.test_inline_additional_properties(request_body)
+    api_instance.test_inline_additional_properties(param)
 except ApiException as e:
     print("Exception when calling FakeApi->test_inline_additional_properties: %s\n" % e)
 ```
@@ -572,7 +572,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **request_body** | [**dict(str, str)**](str.md)| request body | 
+ **param** | [**dict(str, str)**](str.md)| request body | 
 
 ### Return type
 
diff --git a/samples/client/petstore/python/docs/FakeClassnameTags123Api.md b/samples/client/petstore/python/docs/FakeClassnameTags123Api.md
index 3180674a077..64bb06890df 100644
--- a/samples/client/petstore/python/docs/FakeClassnameTags123Api.md
+++ b/samples/client/petstore/python/docs/FakeClassnameTags123Api.md
@@ -8,7 +8,7 @@ Method | HTTP request | Description
 
 
 # **test_classname**
-> Client test_classname(client)
+> Client test_classname(body)
 
 To test class name in snake case
 
@@ -32,11 +32,11 @@ configuration.api_key['api_key_query'] = 'YOUR_API_KEY'
 
 # create an instance of the API class
 api_instance = petstore_api.FakeClassnameTags123Api(petstore_api.ApiClient(configuration))
-client = petstore_api.Client() # Client | client model
+body = petstore_api.Client() # Client | client model
 
 try:
     # To test class name in snake case
-    api_response = api_instance.test_classname(client)
+    api_response = api_instance.test_classname(body)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling FakeClassnameTags123Api->test_classname: %s\n" % e)
@@ -46,7 +46,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **client** | [**Client**](Client.md)| client model | 
+ **body** | [**Client**](Client.md)| client model | 
 
 ### Return type
 
diff --git a/samples/client/petstore/python/docs/Pet.md b/samples/client/petstore/python/docs/Pet.md
index 9e15090300f..f9ea079075d 100644
--- a/samples/client/petstore/python/docs/Pet.md
+++ b/samples/client/petstore/python/docs/Pet.md
@@ -5,7 +5,7 @@ Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **id** | **int** |  | [optional] 
 **category** | [**Category**](Category.md) |  | [optional] 
-**name** | **str** |  | 
+**name** | **str** |  | [default to 'doggie']
 **photo_urls** | **list[str]** |  | 
 **tags** | [**list[Tag]**](Tag.md) |  | [optional] 
 **status** | **str** | pet status in the store | [optional] 
diff --git a/samples/client/petstore/python/docs/PetApi.md b/samples/client/petstore/python/docs/PetApi.md
index 726db4708d7..8a0604706db 100644
--- a/samples/client/petstore/python/docs/PetApi.md
+++ b/samples/client/petstore/python/docs/PetApi.md
@@ -16,7 +16,7 @@ Method | HTTP request | Description
 
 
 # **add_pet**
-> add_pet(pet)
+> add_pet(body)
 
 Add a new pet to the store
 
@@ -36,11 +36,11 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # create an instance of the API class
 api_instance = petstore_api.PetApi(petstore_api.ApiClient(configuration))
-pet = petstore_api.Pet() # Pet | Pet object that needs to be added to the store
+body = petstore_api.Pet() # Pet | Pet object that needs to be added to the store
 
 try:
     # Add a new pet to the store
-    api_instance.add_pet(pet)
+    api_instance.add_pet(body)
 except ApiException as e:
     print("Exception when calling PetApi->add_pet: %s\n" % e)
 ```
@@ -49,7 +49,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **pet** | [**Pet**](Pet.md)| Pet object that needs to be added to the store | 
+ **body** | [**Pet**](Pet.md)| Pet object that needs to be added to the store | 
 
 ### Return type
 
@@ -284,7 +284,7 @@ Name | Type | Description  | Notes
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_pet**
-> update_pet(pet)
+> update_pet(body)
 
 Update an existing pet
 
@@ -304,11 +304,11 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # create an instance of the API class
 api_instance = petstore_api.PetApi(petstore_api.ApiClient(configuration))
-pet = petstore_api.Pet() # Pet | Pet object that needs to be added to the store
+body = petstore_api.Pet() # Pet | Pet object that needs to be added to the store
 
 try:
     # Update an existing pet
-    api_instance.update_pet(pet)
+    api_instance.update_pet(body)
 except ApiException as e:
     print("Exception when calling PetApi->update_pet: %s\n" % e)
 ```
@@ -317,7 +317,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **pet** | [**Pet**](Pet.md)| Pet object that needs to be added to the store | 
+ **body** | [**Pet**](Pet.md)| Pet object that needs to be added to the store | 
 
 ### Return type
 
diff --git a/samples/client/petstore/python/docs/StoreApi.md b/samples/client/petstore/python/docs/StoreApi.md
index ab342460f86..11f04da636e 100644
--- a/samples/client/petstore/python/docs/StoreApi.md
+++ b/samples/client/petstore/python/docs/StoreApi.md
@@ -158,7 +158,7 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **place_order**
-> Order place_order(order)
+> Order place_order(body)
 
 Place an order for a pet
 
@@ -172,11 +172,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.StoreApi()
-order = petstore_api.Order() # Order | order placed for purchasing the pet
+body = petstore_api.Order() # Order | order placed for purchasing the pet
 
 try:
     # Place an order for a pet
-    api_response = api_instance.place_order(order)
+    api_response = api_instance.place_order(body)
     pprint(api_response)
 except ApiException as e:
     print("Exception when calling StoreApi->place_order: %s\n" % e)
@@ -186,7 +186,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **order** | [**Order**](Order.md)| order placed for purchasing the pet | 
+ **body** | [**Order**](Order.md)| order placed for purchasing the pet | 
 
 ### Return type
 
diff --git a/samples/client/petstore/python/docs/TypeHolderDefault.md b/samples/client/petstore/python/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..861da021826
--- /dev/null
+++ b/samples/client/petstore/python/docs/TypeHolderDefault.md
@@ -0,0 +1,14 @@
+# TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**string_item** | **str** |  | [default to 'what']
+**number_item** | **float** |  | 
+**integer_item** | **int** |  | 
+**bool_item** | **bool** |  | [default to True]
+**array_item** | **list[int]** |  | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/samples/client/petstore/python/docs/TypeHolderExample.md b/samples/client/petstore/python/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..1a1535f4dee
--- /dev/null
+++ b/samples/client/petstore/python/docs/TypeHolderExample.md
@@ -0,0 +1,14 @@
+# TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**string_item** | **str** |  | [default to 'what']
+**number_item** | **float** |  | [default to 1.234]
+**integer_item** | **int** |  | [default to -2]
+**bool_item** | **bool** |  | [default to True]
+**array_item** | **list[int]** |  | [default to [0, 1, 2, 3]]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/samples/client/petstore/python/docs/UserApi.md b/samples/client/petstore/python/docs/UserApi.md
index c7cc8b64d66..f0d9581779c 100644
--- a/samples/client/petstore/python/docs/UserApi.md
+++ b/samples/client/petstore/python/docs/UserApi.md
@@ -15,7 +15,7 @@ Method | HTTP request | Description
 
 
 # **create_user**
-> create_user(user)
+> create_user(body)
 
 Create user
 
@@ -31,11 +31,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.UserApi()
-user = petstore_api.User() # User | Created user object
+body = petstore_api.User() # User | Created user object
 
 try:
     # Create user
-    api_instance.create_user(user)
+    api_instance.create_user(body)
 except ApiException as e:
     print("Exception when calling UserApi->create_user: %s\n" % e)
 ```
@@ -44,7 +44,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **user** | [**User**](User.md)| Created user object | 
+ **body** | [**User**](User.md)| Created user object | 
 
 ### Return type
 
@@ -62,7 +62,7 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_users_with_array_input**
-> create_users_with_array_input(user)
+> create_users_with_array_input(body)
 
 Creates list of users with given input array
 
@@ -76,11 +76,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.UserApi()
-user = NULL # list[User] | List of user object
+body = NULL # list[User] | List of user object
 
 try:
     # Creates list of users with given input array
-    api_instance.create_users_with_array_input(user)
+    api_instance.create_users_with_array_input(body)
 except ApiException as e:
     print("Exception when calling UserApi->create_users_with_array_input: %s\n" % e)
 ```
@@ -89,7 +89,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **user** | [**list[User]**](list.md)| List of user object | 
+ **body** | [**list[User]**](list.md)| List of user object | 
 
 ### Return type
 
@@ -107,7 +107,7 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **create_users_with_list_input**
-> create_users_with_list_input(user)
+> create_users_with_list_input(body)
 
 Creates list of users with given input array
 
@@ -121,11 +121,11 @@ from pprint import pprint
 
 # create an instance of the API class
 api_instance = petstore_api.UserApi()
-user = NULL # list[User] | List of user object
+body = NULL # list[User] | List of user object
 
 try:
     # Creates list of users with given input array
-    api_instance.create_users_with_list_input(user)
+    api_instance.create_users_with_list_input(body)
 except ApiException as e:
     print("Exception when calling UserApi->create_users_with_list_input: %s\n" % e)
 ```
@@ -134,7 +134,7 @@ except ApiException as e:
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **user** | [**list[User]**](list.md)| List of user object | 
+ **body** | [**list[User]**](list.md)| List of user object | 
 
 ### Return type
 
@@ -334,7 +334,7 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
 # **update_user**
-> update_user(username, user)
+> update_user(username, body)
 
 Updated user
 
@@ -351,11 +351,11 @@ from pprint import pprint
 # create an instance of the API class
 api_instance = petstore_api.UserApi()
 username = 'username_example' # str | name that need to be deleted
-user = petstore_api.User() # User | Updated user object
+body = petstore_api.User() # User | Updated user object
 
 try:
     # Updated user
-    api_instance.update_user(username, user)
+    api_instance.update_user(username, body)
 except ApiException as e:
     print("Exception when calling UserApi->update_user: %s\n" % e)
 ```
@@ -365,7 +365,7 @@ except ApiException as e:
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **username** | **str**| name that need to be deleted | 
- **user** | [**User**](User.md)| Updated user object | 
+ **body** | [**User**](User.md)| Updated user object | 
 
 ### Return type
 
diff --git a/samples/client/petstore/python/petstore_api/__init__.py b/samples/client/petstore/python/petstore_api/__init__.py
index 88ac77881e3..3e09d89174c 100644
--- a/samples/client/petstore/python/petstore_api/__init__.py
+++ b/samples/client/petstore/python/petstore_api/__init__.py
@@ -61,4 +61,6 @@ from petstore_api.models.pet import Pet
 from petstore_api.models.read_only_first import ReadOnlyFirst
 from petstore_api.models.special_model_name import SpecialModelName
 from petstore_api.models.tag import Tag
+from petstore_api.models.type_holder_default import TypeHolderDefault
+from petstore_api.models.type_holder_example import TypeHolderExample
 from petstore_api.models.user import User
diff --git a/samples/client/petstore/python/petstore_api/api/another_fake_api.py b/samples/client/petstore/python/petstore_api/api/another_fake_api.py
index 782f7fd07b3..9fd3f816b9c 100644
--- a/samples/client/petstore/python/petstore_api/api/another_fake_api.py
+++ b/samples/client/petstore/python/petstore_api/api/another_fake_api.py
@@ -32,39 +32,39 @@ class AnotherFakeApi(object):
             api_client = ApiClient()
         self.api_client = api_client
 
-    def call_123_test_special_tags(self, client, **kwargs):  # noqa: E501
+    def call_123_test_special_tags(self, body, **kwargs):  # noqa: E501
         """To test special tags  # noqa: E501
 
         To test special tags and operation ID starting with number  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.call_123_test_special_tags(client, async_req=True)
+        >>> thread = api.call_123_test_special_tags(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Client client: client model (required)
+        :param Client body: client model (required)
         :return: Client
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.call_123_test_special_tags_with_http_info(client, **kwargs)  # noqa: E501
+            return self.call_123_test_special_tags_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.call_123_test_special_tags_with_http_info(client, **kwargs)  # noqa: E501
+            (data) = self.call_123_test_special_tags_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def call_123_test_special_tags_with_http_info(self, client, **kwargs):  # noqa: E501
+    def call_123_test_special_tags_with_http_info(self, body, **kwargs):  # noqa: E501
         """To test special tags  # noqa: E501
 
         To test special tags and operation ID starting with number  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.call_123_test_special_tags_with_http_info(client, async_req=True)
+        >>> thread = api.call_123_test_special_tags_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Client client: client model (required)
+        :param Client body: client model (required)
         :return: Client
                  If the method is called asynchronously,
                  returns the request thread.
@@ -72,7 +72,7 @@ class AnotherFakeApi(object):
 
         local_var_params = locals()
 
-        all_params = ['client']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -86,10 +86,10 @@ class AnotherFakeApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'client' is set
-        if ('client' not in local_var_params or
-                local_var_params['client'] is None):
-            raise ValueError("Missing the required parameter `client` when calling `call_123_test_special_tags`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `call_123_test_special_tags`")  # noqa: E501
 
         collection_formats = {}
 
@@ -103,8 +103,8 @@ class AnotherFakeApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'client' in local_var_params:
-            body_params = local_var_params['client']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # HTTP header `Accept`
         header_params['Accept'] = self.api_client.select_header_accept(
             ['application/json'])  # noqa: E501
diff --git a/samples/client/petstore/python/petstore_api/api/fake_api.py b/samples/client/petstore/python/petstore_api/api/fake_api.py
index 1647628c407..e9401073dde 100644
--- a/samples/client/petstore/python/petstore_api/api/fake_api.py
+++ b/samples/client/petstore/python/petstore_api/api/fake_api.py
@@ -134,7 +134,7 @@ class FakeApi(object):
         >>> result = thread.get()
 
         :param async_req bool
-        :param OuterComposite outer_composite: Input composite as post body
+        :param OuterComposite body: Input composite as post body
         :return: OuterComposite
                  If the method is called asynchronously,
                  returns the request thread.
@@ -156,7 +156,7 @@ class FakeApi(object):
         >>> result = thread.get()
 
         :param async_req bool
-        :param OuterComposite outer_composite: Input composite as post body
+        :param OuterComposite body: Input composite as post body
         :return: OuterComposite
                  If the method is called asynchronously,
                  returns the request thread.
@@ -164,7 +164,7 @@ class FakeApi(object):
 
         local_var_params = locals()
 
-        all_params = ['outer_composite']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -191,8 +191,8 @@ class FakeApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'outer_composite' in local_var_params:
-            body_params = local_var_params['outer_composite']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # HTTP header `Accept`
         header_params['Accept'] = self.api_client.select_header_accept(
             ['*/*'])  # noqa: E501
@@ -400,39 +400,39 @@ class FakeApi(object):
             _request_timeout=local_var_params.get('_request_timeout'),
             collection_formats=collection_formats)
 
-    def test_body_with_file_schema(self, file_schema_test_class, **kwargs):  # noqa: E501
+    def test_body_with_file_schema(self, body, **kwargs):  # noqa: E501
         """test_body_with_file_schema  # noqa: E501
 
         For this test, the body for this request much reference a schema named `File`.  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_body_with_file_schema(file_schema_test_class, async_req=True)
+        >>> thread = api.test_body_with_file_schema(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param FileSchemaTestClass file_schema_test_class: (required)
+        :param FileSchemaTestClass body: (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.test_body_with_file_schema_with_http_info(file_schema_test_class, **kwargs)  # noqa: E501
+            return self.test_body_with_file_schema_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.test_body_with_file_schema_with_http_info(file_schema_test_class, **kwargs)  # noqa: E501
+            (data) = self.test_body_with_file_schema_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def test_body_with_file_schema_with_http_info(self, file_schema_test_class, **kwargs):  # noqa: E501
+    def test_body_with_file_schema_with_http_info(self, body, **kwargs):  # noqa: E501
         """test_body_with_file_schema  # noqa: E501
 
         For this test, the body for this request much reference a schema named `File`.  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_body_with_file_schema_with_http_info(file_schema_test_class, async_req=True)
+        >>> thread = api.test_body_with_file_schema_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param FileSchemaTestClass file_schema_test_class: (required)
+        :param FileSchemaTestClass body: (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -440,7 +440,7 @@ class FakeApi(object):
 
         local_var_params = locals()
 
-        all_params = ['file_schema_test_class']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -454,10 +454,10 @@ class FakeApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'file_schema_test_class' is set
-        if ('file_schema_test_class' not in local_var_params or
-                local_var_params['file_schema_test_class'] is None):
-            raise ValueError("Missing the required parameter `file_schema_test_class` when calling `test_body_with_file_schema`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `test_body_with_file_schema`")  # noqa: E501
 
         collection_formats = {}
 
@@ -471,8 +471,8 @@ class FakeApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'file_schema_test_class' in local_var_params:
-            body_params = local_var_params['file_schema_test_class']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
             ['application/json'])  # noqa: E501
@@ -496,39 +496,39 @@ class FakeApi(object):
             _request_timeout=local_var_params.get('_request_timeout'),
             collection_formats=collection_formats)
 
-    def test_body_with_query_params(self, query, user, **kwargs):  # noqa: E501
+    def test_body_with_query_params(self, query, body, **kwargs):  # noqa: E501
         """test_body_with_query_params  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_body_with_query_params(query, user, async_req=True)
+        >>> thread = api.test_body_with_query_params(query, body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
         :param str query: (required)
-        :param User user: (required)
+        :param User body: (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.test_body_with_query_params_with_http_info(query, user, **kwargs)  # noqa: E501
+            return self.test_body_with_query_params_with_http_info(query, body, **kwargs)  # noqa: E501
         else:
-            (data) = self.test_body_with_query_params_with_http_info(query, user, **kwargs)  # noqa: E501
+            (data) = self.test_body_with_query_params_with_http_info(query, body, **kwargs)  # noqa: E501
             return data
 
-    def test_body_with_query_params_with_http_info(self, query, user, **kwargs):  # noqa: E501
+    def test_body_with_query_params_with_http_info(self, query, body, **kwargs):  # noqa: E501
         """test_body_with_query_params  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_body_with_query_params_with_http_info(query, user, async_req=True)
+        >>> thread = api.test_body_with_query_params_with_http_info(query, body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
         :param str query: (required)
-        :param User user: (required)
+        :param User body: (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -536,7 +536,7 @@ class FakeApi(object):
 
         local_var_params = locals()
 
-        all_params = ['query', 'user']  # noqa: E501
+        all_params = ['query', 'body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -554,10 +554,10 @@ class FakeApi(object):
         if ('query' not in local_var_params or
                 local_var_params['query'] is None):
             raise ValueError("Missing the required parameter `query` when calling `test_body_with_query_params`")  # noqa: E501
-        # verify the required parameter 'user' is set
-        if ('user' not in local_var_params or
-                local_var_params['user'] is None):
-            raise ValueError("Missing the required parameter `user` when calling `test_body_with_query_params`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `test_body_with_query_params`")  # noqa: E501
 
         collection_formats = {}
 
@@ -573,8 +573,8 @@ class FakeApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'user' in local_var_params:
-            body_params = local_var_params['user']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
             ['application/json'])  # noqa: E501
@@ -598,39 +598,39 @@ class FakeApi(object):
             _request_timeout=local_var_params.get('_request_timeout'),
             collection_formats=collection_formats)
 
-    def test_client_model(self, client, **kwargs):  # noqa: E501
+    def test_client_model(self, body, **kwargs):  # noqa: E501
         """To test \"client\" model  # noqa: E501
 
         To test \"client\" model  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_client_model(client, async_req=True)
+        >>> thread = api.test_client_model(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Client client: client model (required)
+        :param Client body: client model (required)
         :return: Client
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.test_client_model_with_http_info(client, **kwargs)  # noqa: E501
+            return self.test_client_model_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.test_client_model_with_http_info(client, **kwargs)  # noqa: E501
+            (data) = self.test_client_model_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def test_client_model_with_http_info(self, client, **kwargs):  # noqa: E501
+    def test_client_model_with_http_info(self, body, **kwargs):  # noqa: E501
         """To test \"client\" model  # noqa: E501
 
         To test \"client\" model  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_client_model_with_http_info(client, async_req=True)
+        >>> thread = api.test_client_model_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Client client: client model (required)
+        :param Client body: client model (required)
         :return: Client
                  If the method is called asynchronously,
                  returns the request thread.
@@ -638,7 +638,7 @@ class FakeApi(object):
 
         local_var_params = locals()
 
-        all_params = ['client']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -652,10 +652,10 @@ class FakeApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'client' is set
-        if ('client' not in local_var_params or
-                local_var_params['client'] is None):
-            raise ValueError("Missing the required parameter `client` when calling `test_client_model`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `test_client_model`")  # noqa: E501
 
         collection_formats = {}
 
@@ -669,8 +669,8 @@ class FakeApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'client' in local_var_params:
-            body_params = local_var_params['client']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # HTTP header `Accept`
         header_params['Accept'] = self.api_client.select_header_accept(
             ['application/json'])  # noqa: E501
@@ -1129,37 +1129,37 @@ class FakeApi(object):
             _request_timeout=local_var_params.get('_request_timeout'),
             collection_formats=collection_formats)
 
-    def test_inline_additional_properties(self, request_body, **kwargs):  # noqa: E501
+    def test_inline_additional_properties(self, param, **kwargs):  # noqa: E501
         """test inline additionalProperties  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_inline_additional_properties(request_body, async_req=True)
+        >>> thread = api.test_inline_additional_properties(param, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param dict(str, str) request_body: request body (required)
+        :param dict(str, str) param: request body (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.test_inline_additional_properties_with_http_info(request_body, **kwargs)  # noqa: E501
+            return self.test_inline_additional_properties_with_http_info(param, **kwargs)  # noqa: E501
         else:
-            (data) = self.test_inline_additional_properties_with_http_info(request_body, **kwargs)  # noqa: E501
+            (data) = self.test_inline_additional_properties_with_http_info(param, **kwargs)  # noqa: E501
             return data
 
-    def test_inline_additional_properties_with_http_info(self, request_body, **kwargs):  # noqa: E501
+    def test_inline_additional_properties_with_http_info(self, param, **kwargs):  # noqa: E501
         """test inline additionalProperties  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_inline_additional_properties_with_http_info(request_body, async_req=True)
+        >>> thread = api.test_inline_additional_properties_with_http_info(param, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param dict(str, str) request_body: request body (required)
+        :param dict(str, str) param: request body (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1167,7 +1167,7 @@ class FakeApi(object):
 
         local_var_params = locals()
 
-        all_params = ['request_body']  # noqa: E501
+        all_params = ['param']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -1181,10 +1181,10 @@ class FakeApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'request_body' is set
-        if ('request_body' not in local_var_params or
-                local_var_params['request_body'] is None):
-            raise ValueError("Missing the required parameter `request_body` when calling `test_inline_additional_properties`")  # noqa: E501
+        # verify the required parameter 'param' is set
+        if ('param' not in local_var_params or
+                local_var_params['param'] is None):
+            raise ValueError("Missing the required parameter `param` when calling `test_inline_additional_properties`")  # noqa: E501
 
         collection_formats = {}
 
@@ -1198,8 +1198,8 @@ class FakeApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'request_body' in local_var_params:
-            body_params = local_var_params['request_body']
+        if 'param' in local_var_params:
+            body_params = local_var_params['param']
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
             ['application/json'])  # noqa: E501
diff --git a/samples/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py b/samples/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py
index 80e03e6626e..dbf6ef3dfb3 100644
--- a/samples/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py
+++ b/samples/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py
@@ -32,39 +32,39 @@ class FakeClassnameTags123Api(object):
             api_client = ApiClient()
         self.api_client = api_client
 
-    def test_classname(self, client, **kwargs):  # noqa: E501
+    def test_classname(self, body, **kwargs):  # noqa: E501
         """To test class name in snake case  # noqa: E501
 
         To test class name in snake case  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_classname(client, async_req=True)
+        >>> thread = api.test_classname(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Client client: client model (required)
+        :param Client body: client model (required)
         :return: Client
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.test_classname_with_http_info(client, **kwargs)  # noqa: E501
+            return self.test_classname_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.test_classname_with_http_info(client, **kwargs)  # noqa: E501
+            (data) = self.test_classname_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def test_classname_with_http_info(self, client, **kwargs):  # noqa: E501
+    def test_classname_with_http_info(self, body, **kwargs):  # noqa: E501
         """To test class name in snake case  # noqa: E501
 
         To test class name in snake case  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.test_classname_with_http_info(client, async_req=True)
+        >>> thread = api.test_classname_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Client client: client model (required)
+        :param Client body: client model (required)
         :return: Client
                  If the method is called asynchronously,
                  returns the request thread.
@@ -72,7 +72,7 @@ class FakeClassnameTags123Api(object):
 
         local_var_params = locals()
 
-        all_params = ['client']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -86,10 +86,10 @@ class FakeClassnameTags123Api(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'client' is set
-        if ('client' not in local_var_params or
-                local_var_params['client'] is None):
-            raise ValueError("Missing the required parameter `client` when calling `test_classname`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `test_classname`")  # noqa: E501
 
         collection_formats = {}
 
@@ -103,8 +103,8 @@ class FakeClassnameTags123Api(object):
         local_var_files = {}
 
         body_params = None
-        if 'client' in local_var_params:
-            body_params = local_var_params['client']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # HTTP header `Accept`
         header_params['Accept'] = self.api_client.select_header_accept(
             ['application/json'])  # noqa: E501
diff --git a/samples/client/petstore/python/petstore_api/api/pet_api.py b/samples/client/petstore/python/petstore_api/api/pet_api.py
index cee0e90ab5c..f29e7239666 100644
--- a/samples/client/petstore/python/petstore_api/api/pet_api.py
+++ b/samples/client/petstore/python/petstore_api/api/pet_api.py
@@ -32,37 +32,37 @@ class PetApi(object):
             api_client = ApiClient()
         self.api_client = api_client
 
-    def add_pet(self, pet, **kwargs):  # noqa: E501
+    def add_pet(self, body, **kwargs):  # noqa: E501
         """Add a new pet to the store  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.add_pet(pet, async_req=True)
+        >>> thread = api.add_pet(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Pet pet: Pet object that needs to be added to the store (required)
+        :param Pet body: Pet object that needs to be added to the store (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.add_pet_with_http_info(pet, **kwargs)  # noqa: E501
+            return self.add_pet_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.add_pet_with_http_info(pet, **kwargs)  # noqa: E501
+            (data) = self.add_pet_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def add_pet_with_http_info(self, pet, **kwargs):  # noqa: E501
+    def add_pet_with_http_info(self, body, **kwargs):  # noqa: E501
         """Add a new pet to the store  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.add_pet_with_http_info(pet, async_req=True)
+        >>> thread = api.add_pet_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Pet pet: Pet object that needs to be added to the store (required)
+        :param Pet body: Pet object that needs to be added to the store (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -70,7 +70,7 @@ class PetApi(object):
 
         local_var_params = locals()
 
-        all_params = ['pet']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -84,10 +84,10 @@ class PetApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'pet' is set
-        if ('pet' not in local_var_params or
-                local_var_params['pet'] is None):
-            raise ValueError("Missing the required parameter `pet` when calling `add_pet`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `add_pet`")  # noqa: E501
 
         collection_formats = {}
 
@@ -101,8 +101,8 @@ class PetApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'pet' in local_var_params:
-            body_params = local_var_params['pet']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
             ['application/json', 'application/xml'])  # noqa: E501
@@ -510,37 +510,37 @@ class PetApi(object):
             _request_timeout=local_var_params.get('_request_timeout'),
             collection_formats=collection_formats)
 
-    def update_pet(self, pet, **kwargs):  # noqa: E501
+    def update_pet(self, body, **kwargs):  # noqa: E501
         """Update an existing pet  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.update_pet(pet, async_req=True)
+        >>> thread = api.update_pet(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Pet pet: Pet object that needs to be added to the store (required)
+        :param Pet body: Pet object that needs to be added to the store (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.update_pet_with_http_info(pet, **kwargs)  # noqa: E501
+            return self.update_pet_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.update_pet_with_http_info(pet, **kwargs)  # noqa: E501
+            (data) = self.update_pet_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def update_pet_with_http_info(self, pet, **kwargs):  # noqa: E501
+    def update_pet_with_http_info(self, body, **kwargs):  # noqa: E501
         """Update an existing pet  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.update_pet_with_http_info(pet, async_req=True)
+        >>> thread = api.update_pet_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Pet pet: Pet object that needs to be added to the store (required)
+        :param Pet body: Pet object that needs to be added to the store (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -548,7 +548,7 @@ class PetApi(object):
 
         local_var_params = locals()
 
-        all_params = ['pet']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -562,10 +562,10 @@ class PetApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'pet' is set
-        if ('pet' not in local_var_params or
-                local_var_params['pet'] is None):
-            raise ValueError("Missing the required parameter `pet` when calling `update_pet`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `update_pet`")  # noqa: E501
 
         collection_formats = {}
 
@@ -579,8 +579,8 @@ class PetApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'pet' in local_var_params:
-            body_params = local_var_params['pet']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
             ['application/json', 'application/xml'])  # noqa: E501
diff --git a/samples/client/petstore/python/petstore_api/api/store_api.py b/samples/client/petstore/python/petstore_api/api/store_api.py
index 8d471fddabf..bd2677ef92b 100644
--- a/samples/client/petstore/python/petstore_api/api/store_api.py
+++ b/samples/client/petstore/python/petstore_api/api/store_api.py
@@ -312,37 +312,37 @@ class StoreApi(object):
             _request_timeout=local_var_params.get('_request_timeout'),
             collection_formats=collection_formats)
 
-    def place_order(self, order, **kwargs):  # noqa: E501
+    def place_order(self, body, **kwargs):  # noqa: E501
         """Place an order for a pet  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.place_order(order, async_req=True)
+        >>> thread = api.place_order(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Order order: order placed for purchasing the pet (required)
+        :param Order body: order placed for purchasing the pet (required)
         :return: Order
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.place_order_with_http_info(order, **kwargs)  # noqa: E501
+            return self.place_order_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.place_order_with_http_info(order, **kwargs)  # noqa: E501
+            (data) = self.place_order_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def place_order_with_http_info(self, order, **kwargs):  # noqa: E501
+    def place_order_with_http_info(self, body, **kwargs):  # noqa: E501
         """Place an order for a pet  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.place_order_with_http_info(order, async_req=True)
+        >>> thread = api.place_order_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param Order order: order placed for purchasing the pet (required)
+        :param Order body: order placed for purchasing the pet (required)
         :return: Order
                  If the method is called asynchronously,
                  returns the request thread.
@@ -350,7 +350,7 @@ class StoreApi(object):
 
         local_var_params = locals()
 
-        all_params = ['order']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -364,10 +364,10 @@ class StoreApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'order' is set
-        if ('order' not in local_var_params or
-                local_var_params['order'] is None):
-            raise ValueError("Missing the required parameter `order` when calling `place_order`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `place_order`")  # noqa: E501
 
         collection_formats = {}
 
@@ -381,8 +381,8 @@ class StoreApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'order' in local_var_params:
-            body_params = local_var_params['order']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # HTTP header `Accept`
         header_params['Accept'] = self.api_client.select_header_accept(
             ['application/xml', 'application/json'])  # noqa: E501
diff --git a/samples/client/petstore/python/petstore_api/api/user_api.py b/samples/client/petstore/python/petstore_api/api/user_api.py
index e86ac277e97..c27299309a6 100644
--- a/samples/client/petstore/python/petstore_api/api/user_api.py
+++ b/samples/client/petstore/python/petstore_api/api/user_api.py
@@ -32,39 +32,39 @@ class UserApi(object):
             api_client = ApiClient()
         self.api_client = api_client
 
-    def create_user(self, user, **kwargs):  # noqa: E501
+    def create_user(self, body, **kwargs):  # noqa: E501
         """Create user  # noqa: E501
 
         This can only be done by the logged in user.  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.create_user(user, async_req=True)
+        >>> thread = api.create_user(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param User user: Created user object (required)
+        :param User body: Created user object (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.create_user_with_http_info(user, **kwargs)  # noqa: E501
+            return self.create_user_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.create_user_with_http_info(user, **kwargs)  # noqa: E501
+            (data) = self.create_user_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def create_user_with_http_info(self, user, **kwargs):  # noqa: E501
+    def create_user_with_http_info(self, body, **kwargs):  # noqa: E501
         """Create user  # noqa: E501
 
         This can only be done by the logged in user.  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.create_user_with_http_info(user, async_req=True)
+        >>> thread = api.create_user_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param User user: Created user object (required)
+        :param User body: Created user object (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -72,7 +72,7 @@ class UserApi(object):
 
         local_var_params = locals()
 
-        all_params = ['user']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -86,10 +86,10 @@ class UserApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'user' is set
-        if ('user' not in local_var_params or
-                local_var_params['user'] is None):
-            raise ValueError("Missing the required parameter `user` when calling `create_user`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `create_user`")  # noqa: E501
 
         collection_formats = {}
 
@@ -103,8 +103,8 @@ class UserApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'user' in local_var_params:
-            body_params = local_var_params['user']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # Authentication setting
         auth_settings = []  # noqa: E501
 
@@ -124,37 +124,37 @@ class UserApi(object):
             _request_timeout=local_var_params.get('_request_timeout'),
             collection_formats=collection_formats)
 
-    def create_users_with_array_input(self, user, **kwargs):  # noqa: E501
+    def create_users_with_array_input(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.create_users_with_array_input(user, async_req=True)
+        >>> thread = api.create_users_with_array_input(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param list[User] user: List of user object (required)
+        :param list[User] body: List of user object (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.create_users_with_array_input_with_http_info(user, **kwargs)  # noqa: E501
+            return self.create_users_with_array_input_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.create_users_with_array_input_with_http_info(user, **kwargs)  # noqa: E501
+            (data) = self.create_users_with_array_input_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def create_users_with_array_input_with_http_info(self, user, **kwargs):  # noqa: E501
+    def create_users_with_array_input_with_http_info(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.create_users_with_array_input_with_http_info(user, async_req=True)
+        >>> thread = api.create_users_with_array_input_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param list[User] user: List of user object (required)
+        :param list[User] body: List of user object (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -162,7 +162,7 @@ class UserApi(object):
 
         local_var_params = locals()
 
-        all_params = ['user']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -176,10 +176,10 @@ class UserApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'user' is set
-        if ('user' not in local_var_params or
-                local_var_params['user'] is None):
-            raise ValueError("Missing the required parameter `user` when calling `create_users_with_array_input`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `create_users_with_array_input`")  # noqa: E501
 
         collection_formats = {}
 
@@ -193,8 +193,8 @@ class UserApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'user' in local_var_params:
-            body_params = local_var_params['user']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # Authentication setting
         auth_settings = []  # noqa: E501
 
@@ -214,37 +214,37 @@ class UserApi(object):
             _request_timeout=local_var_params.get('_request_timeout'),
             collection_formats=collection_formats)
 
-    def create_users_with_list_input(self, user, **kwargs):  # noqa: E501
+    def create_users_with_list_input(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.create_users_with_list_input(user, async_req=True)
+        >>> thread = api.create_users_with_list_input(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param list[User] user: List of user object (required)
+        :param list[User] body: List of user object (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.create_users_with_list_input_with_http_info(user, **kwargs)  # noqa: E501
+            return self.create_users_with_list_input_with_http_info(body, **kwargs)  # noqa: E501
         else:
-            (data) = self.create_users_with_list_input_with_http_info(user, **kwargs)  # noqa: E501
+            (data) = self.create_users_with_list_input_with_http_info(body, **kwargs)  # noqa: E501
             return data
 
-    def create_users_with_list_input_with_http_info(self, user, **kwargs):  # noqa: E501
+    def create_users_with_list_input_with_http_info(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
 
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.create_users_with_list_input_with_http_info(user, async_req=True)
+        >>> thread = api.create_users_with_list_input_with_http_info(body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
-        :param list[User] user: List of user object (required)
+        :param list[User] body: List of user object (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -252,7 +252,7 @@ class UserApi(object):
 
         local_var_params = locals()
 
-        all_params = ['user']  # noqa: E501
+        all_params = ['body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -266,10 +266,10 @@ class UserApi(object):
                 )
             local_var_params[key] = val
         del local_var_params['kwargs']
-        # verify the required parameter 'user' is set
-        if ('user' not in local_var_params or
-                local_var_params['user'] is None):
-            raise ValueError("Missing the required parameter `user` when calling `create_users_with_list_input`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `create_users_with_list_input`")  # noqa: E501
 
         collection_formats = {}
 
@@ -283,8 +283,8 @@ class UserApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'user' in local_var_params:
-            body_params = local_var_params['user']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # Authentication setting
         auth_settings = []  # noqa: E501
 
@@ -674,41 +674,41 @@ class UserApi(object):
             _request_timeout=local_var_params.get('_request_timeout'),
             collection_formats=collection_formats)
 
-    def update_user(self, username, user, **kwargs):  # noqa: E501
+    def update_user(self, username, body, **kwargs):  # noqa: E501
         """Updated user  # noqa: E501
 
         This can only be done by the logged in user.  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.update_user(username, user, async_req=True)
+        >>> thread = api.update_user(username, body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
         :param str username: name that need to be deleted (required)
-        :param User user: Updated user object (required)
+        :param User body: Updated user object (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
         """
         kwargs['_return_http_data_only'] = True
         if kwargs.get('async_req'):
-            return self.update_user_with_http_info(username, user, **kwargs)  # noqa: E501
+            return self.update_user_with_http_info(username, body, **kwargs)  # noqa: E501
         else:
-            (data) = self.update_user_with_http_info(username, user, **kwargs)  # noqa: E501
+            (data) = self.update_user_with_http_info(username, body, **kwargs)  # noqa: E501
             return data
 
-    def update_user_with_http_info(self, username, user, **kwargs):  # noqa: E501
+    def update_user_with_http_info(self, username, body, **kwargs):  # noqa: E501
         """Updated user  # noqa: E501
 
         This can only be done by the logged in user.  # noqa: E501
         This method makes a synchronous HTTP request by default. To make an
         asynchronous HTTP request, please pass async_req=True
-        >>> thread = api.update_user_with_http_info(username, user, async_req=True)
+        >>> thread = api.update_user_with_http_info(username, body, async_req=True)
         >>> result = thread.get()
 
         :param async_req bool
         :param str username: name that need to be deleted (required)
-        :param User user: Updated user object (required)
+        :param User body: Updated user object (required)
         :return: None
                  If the method is called asynchronously,
                  returns the request thread.
@@ -716,7 +716,7 @@ class UserApi(object):
 
         local_var_params = locals()
 
-        all_params = ['username', 'user']  # noqa: E501
+        all_params = ['username', 'body']  # noqa: E501
         all_params.append('async_req')
         all_params.append('_return_http_data_only')
         all_params.append('_preload_content')
@@ -734,10 +734,10 @@ class UserApi(object):
         if ('username' not in local_var_params or
                 local_var_params['username'] is None):
             raise ValueError("Missing the required parameter `username` when calling `update_user`")  # noqa: E501
-        # verify the required parameter 'user' is set
-        if ('user' not in local_var_params or
-                local_var_params['user'] is None):
-            raise ValueError("Missing the required parameter `user` when calling `update_user`")  # noqa: E501
+        # verify the required parameter 'body' is set
+        if ('body' not in local_var_params or
+                local_var_params['body'] is None):
+            raise ValueError("Missing the required parameter `body` when calling `update_user`")  # noqa: E501
 
         collection_formats = {}
 
@@ -753,8 +753,8 @@ class UserApi(object):
         local_var_files = {}
 
         body_params = None
-        if 'user' in local_var_params:
-            body_params = local_var_params['user']
+        if 'body' in local_var_params:
+            body_params = local_var_params['body']
         # Authentication setting
         auth_settings = []  # noqa: E501
 
diff --git a/samples/client/petstore/python/petstore_api/models/__init__.py b/samples/client/petstore/python/petstore_api/models/__init__.py
index 393dec06333..a2a081ff443 100644
--- a/samples/client/petstore/python/petstore_api/models/__init__.py
+++ b/samples/client/petstore/python/petstore_api/models/__init__.py
@@ -47,4 +47,6 @@ from petstore_api.models.pet import Pet
 from petstore_api.models.read_only_first import ReadOnlyFirst
 from petstore_api.models.special_model_name import SpecialModelName
 from petstore_api.models.tag import Tag
+from petstore_api.models.type_holder_default import TypeHolderDefault
+from petstore_api.models.type_holder_example import TypeHolderExample
 from petstore_api.models.user import User
diff --git a/samples/client/petstore/python/petstore_api/models/animal.py b/samples/client/petstore/python/petstore_api/models/animal.py
index 5acccf50f7a..abd6f705e5e 100644
--- a/samples/client/petstore/python/petstore_api/models/animal.py
+++ b/samples/client/petstore/python/petstore_api/models/animal.py
@@ -50,7 +50,7 @@ class Animal(object):
 
         self._class_name = None
         self._color = None
-        self.discriminator = 'className'
+        self.discriminator = 'class_name'
 
         self.class_name = class_name
         if color is not None:
@@ -102,7 +102,8 @@ class Animal(object):
 
     def get_real_child_model(self, data):
         """Returns the real base class specified by the discriminator"""
-        discriminator_value = data[self.discriminator]
+        discriminator_key = self.attribute_map[self.discriminator]
+        discriminator_value = data[discriminator_key]
         return self.discriminator_value_class_map.get(discriminator_value)
 
     def to_dict(self):
diff --git a/samples/client/petstore/python/petstore_api/models/pet.py b/samples/client/petstore/python/petstore_api/models/pet.py
index d3c412f4a82..3183f60c797 100644
--- a/samples/client/petstore/python/petstore_api/models/pet.py
+++ b/samples/client/petstore/python/petstore_api/models/pet.py
@@ -48,7 +48,7 @@ class Pet(object):
         'status': 'status'
     }
 
-    def __init__(self, id=None, category=None, name=None, photo_urls=None, tags=None, status=None):  # noqa: E501
+    def __init__(self, id=None, category=None, name='doggie', photo_urls=None, tags=None, status=None):  # noqa: E501
         """Pet - a model defined in OpenAPI"""  # noqa: E501
 
         self._id = None
diff --git a/samples/client/petstore/python/petstore_api/models/type_holder_default.py b/samples/client/petstore/python/petstore_api/models/type_holder_default.py
new file mode 100644
index 00000000000..a0566f5d5fe
--- /dev/null
+++ b/samples/client/petstore/python/petstore_api/models/type_holder_default.py
@@ -0,0 +1,221 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    OpenAPI spec version: 1.0.0
+    Generated by: https://openapi-generator.tech
+"""
+
+
+import pprint
+import re  # noqa: F401
+
+import six
+
+
+class TypeHolderDefault(object):
+    """NOTE: This class is auto generated by OpenAPI Generator.
+    Ref: https://openapi-generator.tech
+
+    Do not edit the class manually.
+    """
+
+    """
+    Attributes:
+      openapi_types (dict): The key is attribute name
+                            and the value is attribute type.
+      attribute_map (dict): The key is attribute name
+                            and the value is json key in definition.
+    """
+    openapi_types = {
+        'string_item': 'str',
+        'number_item': 'float',
+        'integer_item': 'int',
+        'bool_item': 'bool',
+        'array_item': 'list[int]'
+    }
+
+    attribute_map = {
+        'string_item': 'string_item',
+        'number_item': 'number_item',
+        'integer_item': 'integer_item',
+        'bool_item': 'bool_item',
+        'array_item': 'array_item'
+    }
+
+    def __init__(self, string_item='what', number_item=None, integer_item=None, bool_item=True, array_item=None):  # noqa: E501
+        """TypeHolderDefault - a model defined in OpenAPI"""  # noqa: E501
+
+        self._string_item = None
+        self._number_item = None
+        self._integer_item = None
+        self._bool_item = None
+        self._array_item = None
+        self.discriminator = None
+
+        self.string_item = string_item
+        self.number_item = number_item
+        self.integer_item = integer_item
+        self.bool_item = bool_item
+        self.array_item = array_item
+
+    @property
+    def string_item(self):
+        """Gets the string_item of this TypeHolderDefault.  # noqa: E501
+
+
+        :return: The string_item of this TypeHolderDefault.  # noqa: E501
+        :rtype: str
+        """
+        return self._string_item
+
+    @string_item.setter
+    def string_item(self, string_item):
+        """Sets the string_item of this TypeHolderDefault.
+
+
+        :param string_item: The string_item of this TypeHolderDefault.  # noqa: E501
+        :type: str
+        """
+        if string_item is None:
+            raise ValueError("Invalid value for `string_item`, must not be `None`")  # noqa: E501
+
+        self._string_item = string_item
+
+    @property
+    def number_item(self):
+        """Gets the number_item of this TypeHolderDefault.  # noqa: E501
+
+
+        :return: The number_item of this TypeHolderDefault.  # noqa: E501
+        :rtype: float
+        """
+        return self._number_item
+
+    @number_item.setter
+    def number_item(self, number_item):
+        """Sets the number_item of this TypeHolderDefault.
+
+
+        :param number_item: The number_item of this TypeHolderDefault.  # noqa: E501
+        :type: float
+        """
+        if number_item is None:
+            raise ValueError("Invalid value for `number_item`, must not be `None`")  # noqa: E501
+
+        self._number_item = number_item
+
+    @property
+    def integer_item(self):
+        """Gets the integer_item of this TypeHolderDefault.  # noqa: E501
+
+
+        :return: The integer_item of this TypeHolderDefault.  # noqa: E501
+        :rtype: int
+        """
+        return self._integer_item
+
+    @integer_item.setter
+    def integer_item(self, integer_item):
+        """Sets the integer_item of this TypeHolderDefault.
+
+
+        :param integer_item: The integer_item of this TypeHolderDefault.  # noqa: E501
+        :type: int
+        """
+        if integer_item is None:
+            raise ValueError("Invalid value for `integer_item`, must not be `None`")  # noqa: E501
+
+        self._integer_item = integer_item
+
+    @property
+    def bool_item(self):
+        """Gets the bool_item of this TypeHolderDefault.  # noqa: E501
+
+
+        :return: The bool_item of this TypeHolderDefault.  # noqa: E501
+        :rtype: bool
+        """
+        return self._bool_item
+
+    @bool_item.setter
+    def bool_item(self, bool_item):
+        """Sets the bool_item of this TypeHolderDefault.
+
+
+        :param bool_item: The bool_item of this TypeHolderDefault.  # noqa: E501
+        :type: bool
+        """
+        if bool_item is None:
+            raise ValueError("Invalid value for `bool_item`, must not be `None`")  # noqa: E501
+
+        self._bool_item = bool_item
+
+    @property
+    def array_item(self):
+        """Gets the array_item of this TypeHolderDefault.  # noqa: E501
+
+
+        :return: The array_item of this TypeHolderDefault.  # noqa: E501
+        :rtype: list[int]
+        """
+        return self._array_item
+
+    @array_item.setter
+    def array_item(self, array_item):
+        """Sets the array_item of this TypeHolderDefault.
+
+
+        :param array_item: The array_item of this TypeHolderDefault.  # noqa: E501
+        :type: list[int]
+        """
+        if array_item is None:
+            raise ValueError("Invalid value for `array_item`, must not be `None`")  # noqa: E501
+
+        self._array_item = array_item
+
+    def to_dict(self):
+        """Returns the model properties as a dict"""
+        result = {}
+
+        for attr, _ in six.iteritems(self.openapi_types):
+            value = getattr(self, attr)
+            if isinstance(value, list):
+                result[attr] = list(map(
+                    lambda x: x.to_dict() if hasattr(x, "to_dict") else x,
+                    value
+                ))
+            elif hasattr(value, "to_dict"):
+                result[attr] = value.to_dict()
+            elif isinstance(value, dict):
+                result[attr] = dict(map(
+                    lambda item: (item[0], item[1].to_dict())
+                    if hasattr(item[1], "to_dict") else item,
+                    value.items()
+                ))
+            else:
+                result[attr] = value
+
+        return result
+
+    def to_str(self):
+        """Returns the string representation of the model"""
+        return pprint.pformat(self.to_dict())
+
+    def __repr__(self):
+        """For `print` and `pprint`"""
+        return self.to_str()
+
+    def __eq__(self, other):
+        """Returns true if both objects are equal"""
+        if not isinstance(other, TypeHolderDefault):
+            return False
+
+        return self.__dict__ == other.__dict__
+
+    def __ne__(self, other):
+        """Returns true if both objects are not equal"""
+        return not self == other
diff --git a/samples/client/petstore/python/petstore_api/models/type_holder_example.py b/samples/client/petstore/python/petstore_api/models/type_holder_example.py
new file mode 100644
index 00000000000..573354ab4d6
--- /dev/null
+++ b/samples/client/petstore/python/petstore_api/models/type_holder_example.py
@@ -0,0 +1,221 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    OpenAPI spec version: 1.0.0
+    Generated by: https://openapi-generator.tech
+"""
+
+
+import pprint
+import re  # noqa: F401
+
+import six
+
+
+class TypeHolderExample(object):
+    """NOTE: This class is auto generated by OpenAPI Generator.
+    Ref: https://openapi-generator.tech
+
+    Do not edit the class manually.
+    """
+
+    """
+    Attributes:
+      openapi_types (dict): The key is attribute name
+                            and the value is attribute type.
+      attribute_map (dict): The key is attribute name
+                            and the value is json key in definition.
+    """
+    openapi_types = {
+        'string_item': 'str',
+        'number_item': 'float',
+        'integer_item': 'int',
+        'bool_item': 'bool',
+        'array_item': 'list[int]'
+    }
+
+    attribute_map = {
+        'string_item': 'string_item',
+        'number_item': 'number_item',
+        'integer_item': 'integer_item',
+        'bool_item': 'bool_item',
+        'array_item': 'array_item'
+    }
+
+    def __init__(self, string_item='what', number_item=1.234, integer_item=-2, bool_item=True, array_item=[0, 1, 2, 3]):  # noqa: E501
+        """TypeHolderExample - a model defined in OpenAPI"""  # noqa: E501
+
+        self._string_item = None
+        self._number_item = None
+        self._integer_item = None
+        self._bool_item = None
+        self._array_item = None
+        self.discriminator = None
+
+        self.string_item = string_item
+        self.number_item = number_item
+        self.integer_item = integer_item
+        self.bool_item = bool_item
+        self.array_item = array_item
+
+    @property
+    def string_item(self):
+        """Gets the string_item of this TypeHolderExample.  # noqa: E501
+
+
+        :return: The string_item of this TypeHolderExample.  # noqa: E501
+        :rtype: str
+        """
+        return self._string_item
+
+    @string_item.setter
+    def string_item(self, string_item):
+        """Sets the string_item of this TypeHolderExample.
+
+
+        :param string_item: The string_item of this TypeHolderExample.  # noqa: E501
+        :type: str
+        """
+        if string_item is None:
+            raise ValueError("Invalid value for `string_item`, must not be `None`")  # noqa: E501
+
+        self._string_item = string_item
+
+    @property
+    def number_item(self):
+        """Gets the number_item of this TypeHolderExample.  # noqa: E501
+
+
+        :return: The number_item of this TypeHolderExample.  # noqa: E501
+        :rtype: float
+        """
+        return self._number_item
+
+    @number_item.setter
+    def number_item(self, number_item):
+        """Sets the number_item of this TypeHolderExample.
+
+
+        :param number_item: The number_item of this TypeHolderExample.  # noqa: E501
+        :type: float
+        """
+        if number_item is None:
+            raise ValueError("Invalid value for `number_item`, must not be `None`")  # noqa: E501
+
+        self._number_item = number_item
+
+    @property
+    def integer_item(self):
+        """Gets the integer_item of this TypeHolderExample.  # noqa: E501
+
+
+        :return: The integer_item of this TypeHolderExample.  # noqa: E501
+        :rtype: int
+        """
+        return self._integer_item
+
+    @integer_item.setter
+    def integer_item(self, integer_item):
+        """Sets the integer_item of this TypeHolderExample.
+
+
+        :param integer_item: The integer_item of this TypeHolderExample.  # noqa: E501
+        :type: int
+        """
+        if integer_item is None:
+            raise ValueError("Invalid value for `integer_item`, must not be `None`")  # noqa: E501
+
+        self._integer_item = integer_item
+
+    @property
+    def bool_item(self):
+        """Gets the bool_item of this TypeHolderExample.  # noqa: E501
+
+
+        :return: The bool_item of this TypeHolderExample.  # noqa: E501
+        :rtype: bool
+        """
+        return self._bool_item
+
+    @bool_item.setter
+    def bool_item(self, bool_item):
+        """Sets the bool_item of this TypeHolderExample.
+
+
+        :param bool_item: The bool_item of this TypeHolderExample.  # noqa: E501
+        :type: bool
+        """
+        if bool_item is None:
+            raise ValueError("Invalid value for `bool_item`, must not be `None`")  # noqa: E501
+
+        self._bool_item = bool_item
+
+    @property
+    def array_item(self):
+        """Gets the array_item of this TypeHolderExample.  # noqa: E501
+
+
+        :return: The array_item of this TypeHolderExample.  # noqa: E501
+        :rtype: list[int]
+        """
+        return self._array_item
+
+    @array_item.setter
+    def array_item(self, array_item):
+        """Sets the array_item of this TypeHolderExample.
+
+
+        :param array_item: The array_item of this TypeHolderExample.  # noqa: E501
+        :type: list[int]
+        """
+        if array_item is None:
+            raise ValueError("Invalid value for `array_item`, must not be `None`")  # noqa: E501
+
+        self._array_item = array_item
+
+    def to_dict(self):
+        """Returns the model properties as a dict"""
+        result = {}
+
+        for attr, _ in six.iteritems(self.openapi_types):
+            value = getattr(self, attr)
+            if isinstance(value, list):
+                result[attr] = list(map(
+                    lambda x: x.to_dict() if hasattr(x, "to_dict") else x,
+                    value
+                ))
+            elif hasattr(value, "to_dict"):
+                result[attr] = value.to_dict()
+            elif isinstance(value, dict):
+                result[attr] = dict(map(
+                    lambda item: (item[0], item[1].to_dict())
+                    if hasattr(item[1], "to_dict") else item,
+                    value.items()
+                ))
+            else:
+                result[attr] = value
+
+        return result
+
+    def to_str(self):
+        """Returns the string representation of the model"""
+        return pprint.pformat(self.to_dict())
+
+    def __repr__(self):
+        """For `print` and `pprint`"""
+        return self.to_str()
+
+    def __eq__(self, other):
+        """Returns true if both objects are equal"""
+        if not isinstance(other, TypeHolderExample):
+            return False
+
+        return self.__dict__ == other.__dict__
+
+    def __ne__(self, other):
+        """Returns true if both objects are not equal"""
+        return not self == other
diff --git a/samples/client/petstore/python/test/test_type_holder_default.py b/samples/client/petstore/python/test/test_type_holder_default.py
new file mode 100644
index 00000000000..e23ab2a32fc
--- /dev/null
+++ b/samples/client/petstore/python/test/test_type_holder_default.py
@@ -0,0 +1,49 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    OpenAPI spec version: 1.0.0
+    Generated by: https://openapi-generator.tech
+"""
+
+
+from __future__ import absolute_import
+
+import unittest
+
+import petstore_api
+from petstore_api.models.type_holder_default import TypeHolderDefault  # noqa: E501
+from petstore_api.rest import ApiException
+
+
+class TestTypeHolderDefault(unittest.TestCase):
+    """TypeHolderDefault unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def testTypeHolderDefault(self):
+        """Test TypeHolderDefault"""
+        # required_vars are set to None now until swagger-parser/swagger-core fixes
+        # https://github.com/swagger-api/swagger-parser/issues/971
+        required_vars = ['number_item', 'integer_item', 'array_item']
+        sample_values = [5.67, 4, [-5, 2, -6]]
+        assigned_variables = {}
+        for index, required_var in enumerate(required_vars):
+            with self.assertRaises(ValueError):
+                model = TypeHolderDefault(**assigned_variables)
+            assigned_variables[required_var] = sample_values[index]
+        # assigned_variables is fully set, all required variables passed in
+        model = TypeHolderDefault(**assigned_variables)
+        self.assertEqual(model.string_item, 'what')
+        self.assertEqual(model.bool_item, True)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/samples/client/petstore/python/test/test_type_holder_example.py b/samples/client/petstore/python/test/test_type_holder_example.py
new file mode 100644
index 00000000000..64765f26d6c
--- /dev/null
+++ b/samples/client/petstore/python/test/test_type_holder_example.py
@@ -0,0 +1,42 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    OpenAPI spec version: 1.0.0
+    Generated by: https://openapi-generator.tech
+"""
+
+
+from __future__ import absolute_import
+
+import unittest
+
+import petstore_api
+from petstore_api.models.type_holder_example import TypeHolderExample  # noqa: E501
+from petstore_api.rest import ApiException
+
+
+class TestTypeHolderExample(unittest.TestCase):
+    """TypeHolderExample unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def testTypeHolderExample(self):
+        """Test TypeHolderExample"""
+        model = TypeHolderExample()
+        self.assertEqual(model.string_item, 'what')
+        self.assertEqual(model.number_item, 1.234)
+        self.assertEqual(model.integer_item, -2)
+        self.assertEqual(model.bool_item, True)
+        self.assertEqual(model.array_item, [0, 1, 2, 3])
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/samples/client/petstore/python/tests/test_deserialization.py b/samples/client/petstore/python/tests/test_deserialization.py
index 329e4fc5508..6c4e083d1cd 100644
--- a/samples/client/petstore/python/tests/test_deserialization.py
+++ b/samples/client/petstore/python/tests/test_deserialization.py
@@ -8,6 +8,8 @@ $ pip install nose (optional)
 $ cd OpenAPIPetstore-python
 $ nosetests -v
 """
+from collections import namedtuple
+import json
 import os
 import time
 import unittest
@@ -16,11 +18,14 @@ import datetime
 import petstore_api
 
 
+MockResponse = namedtuple('MockResponse', 'data')
+
+
 class DeserializationTests(unittest.TestCase):
 
     def setUp(self):
         self.api_client = petstore_api.ApiClient()
-        self.deserialize = self.api_client._ApiClient__deserialize
+        self.deserialize = self.api_client.deserialize
 
     def test_enum_test(self):
         """ deserialize dict(str, Enum_Test) """
@@ -33,8 +38,9 @@ class DeserializationTests(unittest.TestCase):
                 "outerEnum": "placed"
             }
         }
+        response = MockResponse(data=json.dumps(data))
 
-        deserialized = self.deserialize(data, 'dict(str, EnumTest)')
+        deserialized = self.deserialize(response, 'dict(str, EnumTest)')
         self.assertTrue(isinstance(deserialized, dict))
         self.assertTrue(isinstance(deserialized['enum_test'], petstore_api.EnumTest))
         self.assertEqual(deserialized['enum_test'],
@@ -66,8 +72,9 @@ class DeserializationTests(unittest.TestCase):
                 "status": "available"
             }
         }
+        response = MockResponse(data=json.dumps(data))
 
-        deserialized = self.deserialize(data, 'dict(str, Pet)')
+        deserialized = self.deserialize(response, 'dict(str, Pet)')
         self.assertTrue(isinstance(deserialized, dict))
         self.assertTrue(isinstance(deserialized['pet'], petstore_api.Pet))
 
@@ -81,8 +88,9 @@ class DeserializationTests(unittest.TestCase):
                 "bread": "Jack Russel Terrier"
             }
         }
+        response = MockResponse(data=json.dumps(data))
 
-        deserialized = self.deserialize(data, 'dict(str, Animal)')
+        deserialized = self.deserialize(response, 'dict(str, Animal)')
         self.assertTrue(isinstance(deserialized, dict))
         self.assertTrue(isinstance(deserialized['dog'], petstore_api.Dog))
 
@@ -91,27 +99,34 @@ class DeserializationTests(unittest.TestCase):
         data = {
             'integer': 1
         }
+        response = MockResponse(data=json.dumps(data))
 
-        deserialized = self.deserialize(data, 'dict(str, int)')
+        deserialized = self.deserialize(response, 'dict(str, int)')
         self.assertTrue(isinstance(deserialized, dict))
         self.assertTrue(isinstance(deserialized['integer'], int))
 
     def test_deserialize_str(self):
         """ deserialize str """
         data = "test str"
-        deserialized = self.deserialize(data, "str")
+        response = MockResponse(data=json.dumps(data))
+
+        deserialized = self.deserialize(response, "str")
         self.assertTrue(isinstance(deserialized, str))
 
     def test_deserialize_date(self):
         """ deserialize date """
         data = "1997-07-16"
-        deserialized = self.deserialize(data, "date")
+        response = MockResponse(data=json.dumps(data))
+
+        deserialized = self.deserialize(response, "date")
         self.assertTrue(isinstance(deserialized, datetime.date))
 
     def test_deserialize_datetime(self):
         """ deserialize datetime """
         data = "1997-07-16T19:20:30.45+01:00"
-        deserialized = self.deserialize(data, "datetime")
+        response = MockResponse(data=json.dumps(data))
+
+        deserialized = self.deserialize(response, "datetime")
         self.assertTrue(isinstance(deserialized, datetime.datetime))
 
     def test_deserialize_pet(self):
@@ -134,7 +149,9 @@ class DeserializationTests(unittest.TestCase):
             ],
             "status": "available"
         }
-        deserialized = self.deserialize(data, "Pet")
+        response = MockResponse(data=json.dumps(data))
+
+        deserialized = self.deserialize(response, "Pet")
         self.assertTrue(isinstance(deserialized, petstore_api.Pet))
         self.assertEqual(deserialized.id, 0)
         self.assertEqual(deserialized.name, "doggie")
@@ -182,7 +199,9 @@ class DeserializationTests(unittest.TestCase):
                 ],
                 "status": "available"
             }]
-        deserialized = self.deserialize(data, "list[Pet]")
+        response = MockResponse(data=json.dumps(data))
+
+        deserialized = self.deserialize(response, "list[Pet]")
         self.assertTrue(isinstance(deserialized, list))
         self.assertTrue(isinstance(deserialized[0], petstore_api.Pet))
         self.assertEqual(deserialized[0].id, 0)
@@ -197,8 +216,9 @@ class DeserializationTests(unittest.TestCase):
                 "bar": 1
             }
         }
+        response = MockResponse(data=json.dumps(data))
 
-        deserialized = self.deserialize(data, "dict(str, dict(str, int))")
+        deserialized = self.deserialize(response, "dict(str, dict(str, int))")
         self.assertTrue(isinstance(deserialized, dict))
         self.assertTrue(isinstance(deserialized["foo"], dict))
         self.assertTrue(isinstance(deserialized["foo"]["bar"], int))
@@ -206,13 +226,16 @@ class DeserializationTests(unittest.TestCase):
     def test_deserialize_nested_list(self):
         """ deserialize list[list[str]] """
         data = [["foo"]]
+        response = MockResponse(data=json.dumps(data))
 
-        deserialized = self.deserialize(data, "list[list[str]]")
+        deserialized = self.deserialize(response, "list[list[str]]")
         self.assertTrue(isinstance(deserialized, list))
         self.assertTrue(isinstance(deserialized[0], list))
         self.assertTrue(isinstance(deserialized[0][0], str))
 
     def test_deserialize_none(self):
         """ deserialize None """
-        deserialized = self.deserialize(None, "datetime")
+        response = MockResponse(data=json.dumps(None))
+
+        deserialized = self.deserialize(response, "datetime")
         self.assertIsNone(deserialized)
diff --git a/samples/client/petstore/ruby/README.md b/samples/client/petstore/ruby/README.md
index f94148add4a..4c83eb54b5f 100644
--- a/samples/client/petstore/ruby/README.md
+++ b/samples/client/petstore/ruby/README.md
@@ -145,6 +145,8 @@ Class | Method | HTTP request | Description
  - [Petstore::ReadOnlyFirst](docs/ReadOnlyFirst.md)
  - [Petstore::SpecialModelName](docs/SpecialModelName.md)
  - [Petstore::Tag](docs/Tag.md)
+ - [Petstore::TypeHolderDefault](docs/TypeHolderDefault.md)
+ - [Petstore::TypeHolderExample](docs/TypeHolderExample.md)
  - [Petstore::User](docs/User.md)
 
 
diff --git a/samples/client/petstore/ruby/docs/TypeHolderDefault.md b/samples/client/petstore/ruby/docs/TypeHolderDefault.md
new file mode 100644
index 00000000000..eaadc04a66c
--- /dev/null
+++ b/samples/client/petstore/ruby/docs/TypeHolderDefault.md
@@ -0,0 +1,12 @@
+# Petstore::TypeHolderDefault
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**string_item** | **String** |  | [default to &#39;what&#39;]
+**number_item** | **Float** |  | 
+**integer_item** | **Integer** |  | 
+**bool_item** | **BOOLEAN** |  | [default to true]
+**array_item** | **Array&lt;Integer&gt;** |  | 
+
+
diff --git a/samples/client/petstore/ruby/docs/TypeHolderExample.md b/samples/client/petstore/ruby/docs/TypeHolderExample.md
new file mode 100644
index 00000000000..f93b2d4de4e
--- /dev/null
+++ b/samples/client/petstore/ruby/docs/TypeHolderExample.md
@@ -0,0 +1,12 @@
+# Petstore::TypeHolderExample
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**string_item** | **String** |  | 
+**number_item** | **Float** |  | 
+**integer_item** | **Integer** |  | 
+**bool_item** | **BOOLEAN** |  | 
+**array_item** | **Array&lt;Integer&gt;** |  | 
+
+
diff --git a/samples/client/petstore/ruby/lib/petstore.rb b/samples/client/petstore/ruby/lib/petstore.rb
index ac772a10fa4..c01921ea36e 100644
--- a/samples/client/petstore/ruby/lib/petstore.rb
+++ b/samples/client/petstore/ruby/lib/petstore.rb
@@ -50,6 +50,8 @@ require 'petstore/models/pet'
 require 'petstore/models/read_only_first'
 require 'petstore/models/special_model_name'
 require 'petstore/models/tag'
+require 'petstore/models/type_holder_default'
+require 'petstore/models/type_holder_example'
 require 'petstore/models/user'
 
 # APIs
diff --git a/samples/client/petstore/ruby/lib/petstore/models/type_holder_default.rb b/samples/client/petstore/ruby/lib/petstore/models/type_holder_default.rb
new file mode 100644
index 00000000000..af54792b187
--- /dev/null
+++ b/samples/client/petstore/ruby/lib/petstore/models/type_holder_default.rb
@@ -0,0 +1,258 @@
+=begin
+#OpenAPI Petstore
+
+#This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+OpenAPI spec version: 1.0.0
+
+Generated by: https://openapi-generator.tech
+OpenAPI Generator version: 4.0.0-SNAPSHOT
+
+=end
+
+require 'date'
+
+module Petstore
+  class TypeHolderDefault
+    attr_accessor :string_item
+
+    attr_accessor :number_item
+
+    attr_accessor :integer_item
+
+    attr_accessor :bool_item
+
+    attr_accessor :array_item
+
+    # Attribute mapping from ruby-style variable name to JSON key.
+    def self.attribute_map
+      {
+        :'string_item' => :'string_item',
+        :'number_item' => :'number_item',
+        :'integer_item' => :'integer_item',
+        :'bool_item' => :'bool_item',
+        :'array_item' => :'array_item'
+      }
+    end
+
+    # Attribute type mapping.
+    def self.openapi_types
+      {
+        :'string_item' => :'String',
+        :'number_item' => :'Float',
+        :'integer_item' => :'Integer',
+        :'bool_item' => :'BOOLEAN',
+        :'array_item' => :'Array<Integer>'
+      }
+    end
+
+    # Initializes the object
+    # @param [Hash] attributes Model attributes in the form of hash
+    def initialize(attributes = {})
+      return unless attributes.is_a?(Hash)
+
+      # convert string to symbol for hash key
+      attributes = attributes.each_with_object({}) { |(k, v), h| h[k.to_sym] = v }
+
+      if attributes.has_key?(:'string_item')
+        self.string_item = attributes[:'string_item']
+      else
+        self.string_item = 'what'
+      end
+
+      if attributes.has_key?(:'number_item')
+        self.number_item = attributes[:'number_item']
+      end
+
+      if attributes.has_key?(:'integer_item')
+        self.integer_item = attributes[:'integer_item']
+      end
+
+      if attributes.has_key?(:'bool_item')
+        self.bool_item = attributes[:'bool_item']
+      else
+        self.bool_item = true
+      end
+
+      if attributes.has_key?(:'array_item')
+        if (value = attributes[:'array_item']).is_a?(Array)
+          self.array_item = value
+        end
+      end
+    end
+
+    # Show invalid properties with the reasons. Usually used together with valid?
+    # @return Array for valid properties with the reasons
+    def list_invalid_properties
+      invalid_properties = Array.new
+      if @string_item.nil?
+        invalid_properties.push('invalid value for "string_item", string_item cannot be nil.')
+      end
+
+      if @number_item.nil?
+        invalid_properties.push('invalid value for "number_item", number_item cannot be nil.')
+      end
+
+      if @integer_item.nil?
+        invalid_properties.push('invalid value for "integer_item", integer_item cannot be nil.')
+      end
+
+      if @bool_item.nil?
+        invalid_properties.push('invalid value for "bool_item", bool_item cannot be nil.')
+      end
+
+      if @array_item.nil?
+        invalid_properties.push('invalid value for "array_item", array_item cannot be nil.')
+      end
+
+      invalid_properties
+    end
+
+    # Check to see if the all the properties in the model are valid
+    # @return true if the model is valid
+    def valid?
+      return false if @string_item.nil?
+      return false if @number_item.nil?
+      return false if @integer_item.nil?
+      return false if @bool_item.nil?
+      return false if @array_item.nil?
+      true
+    end
+
+    # Checks equality by comparing each attribute.
+    # @param [Object] Object to be compared
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          string_item == o.string_item &&
+          number_item == o.number_item &&
+          integer_item == o.integer_item &&
+          bool_item == o.bool_item &&
+          array_item == o.array_item
+    end
+
+    # @see the `==` method
+    # @param [Object] Object to be compared
+    def eql?(o)
+      self == o
+    end
+
+    # Calculates hash code according to all attributes.
+    # @return [Fixnum] Hash code
+    def hash
+      [string_item, number_item, integer_item, bool_item, array_item].hash
+    end
+
+    # Builds the object from hash
+    # @param [Hash] attributes Model attributes in the form of hash
+    # @return [Object] Returns the model itself
+    def self.build_from_hash(attributes)
+      new.build_from_hash(attributes)
+    end
+
+    # Builds the object from hash
+    # @param [Hash] attributes Model attributes in the form of hash
+    # @return [Object] Returns the model itself
+    def build_from_hash(attributes)
+      return nil unless attributes.is_a?(Hash)
+      self.class.openapi_types.each_pair do |key, type|
+        if type =~ /\AArray<(.*)>/i
+          # check to ensure the input is an array given that the the attribute
+          # is documented as an array but the input is not
+          if attributes[self.class.attribute_map[key]].is_a?(Array)
+            self.send("#{key}=", attributes[self.class.attribute_map[key]].map { |v| _deserialize($1, v) })
+          end
+        elsif !attributes[self.class.attribute_map[key]].nil?
+          self.send("#{key}=", _deserialize(type, attributes[self.class.attribute_map[key]]))
+        end # or else data not found in attributes(hash), not an issue as the data can be optional
+      end
+
+      self
+    end
+
+    # Deserializes the data based on type
+    # @param string type Data type
+    # @param string value Value to be deserialized
+    # @return [Object] Deserialized data
+    def _deserialize(type, value)
+      case type.to_sym
+      when :DateTime
+        DateTime.parse(value)
+      when :Date
+        Date.parse(value)
+      when :String
+        value.to_s
+      when :Integer
+        value.to_i
+      when :Float
+        value.to_f
+      when :BOOLEAN
+        if value.to_s =~ /\A(true|t|yes|y|1)\z/i
+          true
+        else
+          false
+        end
+      when :Object
+        # generic object (usually a Hash), return directly
+        value
+      when /\AArray<(?<inner_type>.+)>\z/
+        inner_type = Regexp.last_match[:inner_type]
+        value.map { |v| _deserialize(inner_type, v) }
+      when /\AHash<(?<k_type>.+?), (?<v_type>.+)>\z/
+        k_type = Regexp.last_match[:k_type]
+        v_type = Regexp.last_match[:v_type]
+        {}.tap do |hash|
+          value.each do |k, v|
+            hash[_deserialize(k_type, k)] = _deserialize(v_type, v)
+          end
+        end
+      else # model
+        Petstore.const_get(type).build_from_hash(value)
+      end
+    end
+
+    # Returns the string representation of the object
+    # @return [String] String presentation of the object
+    def to_s
+      to_hash.to_s
+    end
+
+    # to_body is an alias to to_hash (backward compatibility)
+    # @return [Hash] Returns the object in the form of hash
+    def to_body
+      to_hash
+    end
+
+    # Returns the object in the form of hash
+    # @return [Hash] Returns the object in the form of hash
+    def to_hash
+      hash = {}
+      self.class.attribute_map.each_pair do |attr, param|
+        value = self.send(attr)
+        next if value.nil?
+        hash[param] = _to_hash(value)
+      end
+      hash
+    end
+
+    # Outputs non-array value in the form of hash
+    # For object, use to_hash. Otherwise, just return the value
+    # @param [Object] value Any valid value
+    # @return [Hash] Returns the value in the form of hash
+    def _to_hash(value)
+      if value.is_a?(Array)
+        value.compact.map { |v| _to_hash(v) }
+      elsif value.is_a?(Hash)
+        {}.tap do |hash|
+          value.each { |k, v| hash[k] = _to_hash(v) }
+        end
+      elsif value.respond_to? :to_hash
+        value.to_hash
+      else
+        value
+      end
+    end
+
+  end
+
+end
diff --git a/samples/client/petstore/ruby/lib/petstore/models/type_holder_example.rb b/samples/client/petstore/ruby/lib/petstore/models/type_holder_example.rb
new file mode 100644
index 00000000000..e4af77d8034
--- /dev/null
+++ b/samples/client/petstore/ruby/lib/petstore/models/type_holder_example.rb
@@ -0,0 +1,254 @@
+=begin
+#OpenAPI Petstore
+
+#This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+OpenAPI spec version: 1.0.0
+
+Generated by: https://openapi-generator.tech
+OpenAPI Generator version: 4.0.0-SNAPSHOT
+
+=end
+
+require 'date'
+
+module Petstore
+  class TypeHolderExample
+    attr_accessor :string_item
+
+    attr_accessor :number_item
+
+    attr_accessor :integer_item
+
+    attr_accessor :bool_item
+
+    attr_accessor :array_item
+
+    # Attribute mapping from ruby-style variable name to JSON key.
+    def self.attribute_map
+      {
+        :'string_item' => :'string_item',
+        :'number_item' => :'number_item',
+        :'integer_item' => :'integer_item',
+        :'bool_item' => :'bool_item',
+        :'array_item' => :'array_item'
+      }
+    end
+
+    # Attribute type mapping.
+    def self.openapi_types
+      {
+        :'string_item' => :'String',
+        :'number_item' => :'Float',
+        :'integer_item' => :'Integer',
+        :'bool_item' => :'BOOLEAN',
+        :'array_item' => :'Array<Integer>'
+      }
+    end
+
+    # Initializes the object
+    # @param [Hash] attributes Model attributes in the form of hash
+    def initialize(attributes = {})
+      return unless attributes.is_a?(Hash)
+
+      # convert string to symbol for hash key
+      attributes = attributes.each_with_object({}) { |(k, v), h| h[k.to_sym] = v }
+
+      if attributes.has_key?(:'string_item')
+        self.string_item = attributes[:'string_item']
+      end
+
+      if attributes.has_key?(:'number_item')
+        self.number_item = attributes[:'number_item']
+      end
+
+      if attributes.has_key?(:'integer_item')
+        self.integer_item = attributes[:'integer_item']
+      end
+
+      if attributes.has_key?(:'bool_item')
+        self.bool_item = attributes[:'bool_item']
+      end
+
+      if attributes.has_key?(:'array_item')
+        if (value = attributes[:'array_item']).is_a?(Array)
+          self.array_item = value
+        end
+      end
+    end
+
+    # Show invalid properties with the reasons. Usually used together with valid?
+    # @return Array for valid properties with the reasons
+    def list_invalid_properties
+      invalid_properties = Array.new
+      if @string_item.nil?
+        invalid_properties.push('invalid value for "string_item", string_item cannot be nil.')
+      end
+
+      if @number_item.nil?
+        invalid_properties.push('invalid value for "number_item", number_item cannot be nil.')
+      end
+
+      if @integer_item.nil?
+        invalid_properties.push('invalid value for "integer_item", integer_item cannot be nil.')
+      end
+
+      if @bool_item.nil?
+        invalid_properties.push('invalid value for "bool_item", bool_item cannot be nil.')
+      end
+
+      if @array_item.nil?
+        invalid_properties.push('invalid value for "array_item", array_item cannot be nil.')
+      end
+
+      invalid_properties
+    end
+
+    # Check to see if the all the properties in the model are valid
+    # @return true if the model is valid
+    def valid?
+      return false if @string_item.nil?
+      return false if @number_item.nil?
+      return false if @integer_item.nil?
+      return false if @bool_item.nil?
+      return false if @array_item.nil?
+      true
+    end
+
+    # Checks equality by comparing each attribute.
+    # @param [Object] Object to be compared
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          string_item == o.string_item &&
+          number_item == o.number_item &&
+          integer_item == o.integer_item &&
+          bool_item == o.bool_item &&
+          array_item == o.array_item
+    end
+
+    # @see the `==` method
+    # @param [Object] Object to be compared
+    def eql?(o)
+      self == o
+    end
+
+    # Calculates hash code according to all attributes.
+    # @return [Fixnum] Hash code
+    def hash
+      [string_item, number_item, integer_item, bool_item, array_item].hash
+    end
+
+    # Builds the object from hash
+    # @param [Hash] attributes Model attributes in the form of hash
+    # @return [Object] Returns the model itself
+    def self.build_from_hash(attributes)
+      new.build_from_hash(attributes)
+    end
+
+    # Builds the object from hash
+    # @param [Hash] attributes Model attributes in the form of hash
+    # @return [Object] Returns the model itself
+    def build_from_hash(attributes)
+      return nil unless attributes.is_a?(Hash)
+      self.class.openapi_types.each_pair do |key, type|
+        if type =~ /\AArray<(.*)>/i
+          # check to ensure the input is an array given that the the attribute
+          # is documented as an array but the input is not
+          if attributes[self.class.attribute_map[key]].is_a?(Array)
+            self.send("#{key}=", attributes[self.class.attribute_map[key]].map { |v| _deserialize($1, v) })
+          end
+        elsif !attributes[self.class.attribute_map[key]].nil?
+          self.send("#{key}=", _deserialize(type, attributes[self.class.attribute_map[key]]))
+        end # or else data not found in attributes(hash), not an issue as the data can be optional
+      end
+
+      self
+    end
+
+    # Deserializes the data based on type
+    # @param string type Data type
+    # @param string value Value to be deserialized
+    # @return [Object] Deserialized data
+    def _deserialize(type, value)
+      case type.to_sym
+      when :DateTime
+        DateTime.parse(value)
+      when :Date
+        Date.parse(value)
+      when :String
+        value.to_s
+      when :Integer
+        value.to_i
+      when :Float
+        value.to_f
+      when :BOOLEAN
+        if value.to_s =~ /\A(true|t|yes|y|1)\z/i
+          true
+        else
+          false
+        end
+      when :Object
+        # generic object (usually a Hash), return directly
+        value
+      when /\AArray<(?<inner_type>.+)>\z/
+        inner_type = Regexp.last_match[:inner_type]
+        value.map { |v| _deserialize(inner_type, v) }
+      when /\AHash<(?<k_type>.+?), (?<v_type>.+)>\z/
+        k_type = Regexp.last_match[:k_type]
+        v_type = Regexp.last_match[:v_type]
+        {}.tap do |hash|
+          value.each do |k, v|
+            hash[_deserialize(k_type, k)] = _deserialize(v_type, v)
+          end
+        end
+      else # model
+        Petstore.const_get(type).build_from_hash(value)
+      end
+    end
+
+    # Returns the string representation of the object
+    # @return [String] String presentation of the object
+    def to_s
+      to_hash.to_s
+    end
+
+    # to_body is an alias to to_hash (backward compatibility)
+    # @return [Hash] Returns the object in the form of hash
+    def to_body
+      to_hash
+    end
+
+    # Returns the object in the form of hash
+    # @return [Hash] Returns the object in the form of hash
+    def to_hash
+      hash = {}
+      self.class.attribute_map.each_pair do |attr, param|
+        value = self.send(attr)
+        next if value.nil?
+        hash[param] = _to_hash(value)
+      end
+      hash
+    end
+
+    # Outputs non-array value in the form of hash
+    # For object, use to_hash. Otherwise, just return the value
+    # @param [Object] value Any valid value
+    # @return [Hash] Returns the value in the form of hash
+    def _to_hash(value)
+      if value.is_a?(Array)
+        value.compact.map { |v| _to_hash(v) }
+      elsif value.is_a?(Hash)
+        {}.tap do |hash|
+          value.each { |k, v| hash[k] = _to_hash(v) }
+        end
+      elsif value.respond_to? :to_hash
+        value.to_hash
+      else
+        value
+      end
+    end
+
+  end
+
+end
diff --git a/samples/client/petstore/ruby/spec/models/type_holder_default_spec.rb b/samples/client/petstore/ruby/spec/models/type_holder_default_spec.rb
new file mode 100644
index 00000000000..8770adbbaa6
--- /dev/null
+++ b/samples/client/petstore/ruby/spec/models/type_holder_default_spec.rb
@@ -0,0 +1,65 @@
+=begin
+#OpenAPI Petstore
+
+#This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+OpenAPI spec version: 1.0.0
+
+Generated by: https://openapi-generator.tech
+OpenAPI Generator version: 4.0.0-SNAPSHOT
+
+=end
+
+require 'spec_helper'
+require 'json'
+require 'date'
+
+# Unit tests for Petstore::TypeHolderDefault
+# Automatically generated by openapi-generator (https://openapi-generator.tech)
+# Please update as you see appropriate
+describe 'TypeHolderDefault' do
+  before do
+    # run before each test
+    @instance = Petstore::TypeHolderDefault.new
+  end
+
+  after do
+    # run after each test
+  end
+
+  describe 'test an instance of TypeHolderDefault' do
+    it 'should create an instance of TypeHolderDefault' do
+      expect(@instance).to be_instance_of(Petstore::TypeHolderDefault)
+    end
+  end
+  describe 'test attribute "string_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+  describe 'test attribute "number_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+  describe 'test attribute "integer_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+  describe 'test attribute "bool_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+  describe 'test attribute "array_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+end
diff --git a/samples/client/petstore/ruby/spec/models/type_holder_example_spec.rb b/samples/client/petstore/ruby/spec/models/type_holder_example_spec.rb
new file mode 100644
index 00000000000..b7af5697115
--- /dev/null
+++ b/samples/client/petstore/ruby/spec/models/type_holder_example_spec.rb
@@ -0,0 +1,65 @@
+=begin
+#OpenAPI Petstore
+
+#This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+
+OpenAPI spec version: 1.0.0
+
+Generated by: https://openapi-generator.tech
+OpenAPI Generator version: 4.0.0-SNAPSHOT
+
+=end
+
+require 'spec_helper'
+require 'json'
+require 'date'
+
+# Unit tests for Petstore::TypeHolderExample
+# Automatically generated by openapi-generator (https://openapi-generator.tech)
+# Please update as you see appropriate
+describe 'TypeHolderExample' do
+  before do
+    # run before each test
+    @instance = Petstore::TypeHolderExample.new
+  end
+
+  after do
+    # run after each test
+  end
+
+  describe 'test an instance of TypeHolderExample' do
+    it 'should create an instance of TypeHolderExample' do
+      expect(@instance).to be_instance_of(Petstore::TypeHolderExample)
+    end
+  end
+  describe 'test attribute "string_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+  describe 'test attribute "number_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+  describe 'test attribute "integer_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+  describe 'test attribute "bool_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+  describe 'test attribute "array_item"' do
+    it 'should work' do
+      # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+    end
+  end
+
+end
diff --git a/samples/schema/petstore/mysql/mysql_schema.sql b/samples/schema/petstore/mysql/mysql_schema.sql
index 5870b90fab9..c4c06ab189c 100644
--- a/samples/schema/petstore/mysql/mysql_schema.sql
+++ b/samples/schema/petstore/mysql/mysql_schema.sql
@@ -316,6 +316,30 @@ CREATE TABLE IF NOT EXISTS `Tag` (
   `name` TEXT DEFAULT NULL
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
+--
+-- Table structure for table `TypeHolderDefault` generated from model 'TypeHolderDefault'
+--
+
+CREATE TABLE IF NOT EXISTS `TypeHolderDefault` (
+  `string_item` TEXT NOT NULL,
+  `number_item` DECIMAL(20, 9) NOT NULL,
+  `integer_item` INT NOT NULL,
+  `bool_item` TINYINT(1) NOT NULL,
+  `array_item` JSON NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+--
+-- Table structure for table `TypeHolderExample` generated from model 'TypeHolderExample'
+--
+
+CREATE TABLE IF NOT EXISTS `TypeHolderExample` (
+  `string_item` TEXT NOT NULL,
+  `number_item` DECIMAL(20, 9) NOT NULL,
+  `integer_item` INT NOT NULL,
+  `bool_item` TINYINT(1) NOT NULL,
+  `array_item` JSON NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
 --
 -- Table structure for table `User` generated from model 'User'
 --
diff --git a/samples/server/petstore/jaxrs-cxf/src/gen/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/jaxrs-cxf/src/gen/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..ace8f6a23bd
--- /dev/null
+++ b/samples/server/petstore/jaxrs-cxf/src/gen/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,162 @@
+package org.openapitools.model;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+import io.swagger.annotations.ApiModelProperty;
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlType;
+import javax.xml.bind.annotation.XmlEnum;
+import javax.xml.bind.annotation.XmlEnumValue;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class TypeHolderDefault  {
+  
+  @ApiModelProperty(required = true, value = "")
+  private String stringItem = "what";
+
+  @ApiModelProperty(required = true, value = "")
+  @Valid
+  private BigDecimal numberItem;
+
+  @ApiModelProperty(required = true, value = "")
+  private Integer integerItem;
+
+  @ApiModelProperty(required = true, value = "")
+  private Boolean boolItem = true;
+
+  @ApiModelProperty(required = true, value = "")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+ /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @JsonProperty("string_item")
+  @NotNull
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+ /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @JsonProperty("number_item")
+  @NotNull
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+ /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @JsonProperty("integer_item")
+  @NotNull
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+ /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @JsonProperty("bool_item")
+  @NotNull
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+ /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @JsonProperty("array_item")
+  @NotNull
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private static String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs-cxf/src/gen/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/jaxrs-cxf/src/gen/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..9d82e8ca2f0
--- /dev/null
+++ b/samples/server/petstore/jaxrs-cxf/src/gen/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,162 @@
+package org.openapitools.model;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+import io.swagger.annotations.ApiModelProperty;
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlType;
+import javax.xml.bind.annotation.XmlEnum;
+import javax.xml.bind.annotation.XmlEnumValue;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class TypeHolderExample  {
+  
+  @ApiModelProperty(example = "what", required = true, value = "")
+  private String stringItem;
+
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @Valid
+  private BigDecimal numberItem;
+
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  private Integer integerItem;
+
+  @ApiModelProperty(example = "true", required = true, value = "")
+  private Boolean boolItem;
+
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+ /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @JsonProperty("string_item")
+  @NotNull
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+ /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @JsonProperty("number_item")
+  @NotNull
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+ /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @JsonProperty("integer_item")
+  @NotNull
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+ /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @JsonProperty("bool_item")
+  @NotNull
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+ /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @JsonProperty("array_item")
+  @NotNull
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private static String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs-datelib-j8/src/gen/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/jaxrs-datelib-j8/src/gen/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..3cdcb620220
--- /dev/null
+++ b/samples/server/petstore/jaxrs-datelib-j8/src/gen/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,206 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import java.io.Serializable;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault  implements Serializable {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs-datelib-j8/src/gen/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/jaxrs-datelib-j8/src/gen/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..01974197407
--- /dev/null
+++ b/samples/server/petstore/jaxrs-datelib-j8/src/gen/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,206 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import java.io.Serializable;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample  implements Serializable {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(example = "what", required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(example = "-2", required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(example = "true", required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs-spec-interface/src/gen/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/jaxrs-spec-interface/src/gen/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..b0cfc27703c
--- /dev/null
+++ b/samples/server/petstore/jaxrs-spec-interface/src/gen/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,165 @@
+package org.openapitools.model;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import java.io.Serializable;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+import io.swagger.annotations.*;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+
+
+public class TypeHolderDefault  implements Serializable {
+  
+  private @Valid String stringItem = "what";
+  private @Valid BigDecimal numberItem;
+  private @Valid Integer integerItem;
+  private @Valid Boolean boolItem = true;
+  private @Valid List<Integer> arrayItem = new ArrayList<Integer>();
+
+  /**
+   **/
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("string_item")
+  @NotNull
+  public String getStringItem() {
+    return stringItem;
+  }
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  /**
+   **/
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("number_item")
+  @NotNull
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  /**
+   **/
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("integer_item")
+  @NotNull
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  /**
+   **/
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("bool_item")
+  @NotNull
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  /**
+   **/
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("array_item")
+  @NotNull
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs-spec-interface/src/gen/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/jaxrs-spec-interface/src/gen/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..e7f2199029d
--- /dev/null
+++ b/samples/server/petstore/jaxrs-spec-interface/src/gen/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,165 @@
+package org.openapitools.model;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import java.io.Serializable;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+import io.swagger.annotations.*;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+
+
+public class TypeHolderExample  implements Serializable {
+  
+  private @Valid String stringItem;
+  private @Valid BigDecimal numberItem;
+  private @Valid Integer integerItem;
+  private @Valid Boolean boolItem;
+  private @Valid List<Integer> arrayItem = new ArrayList<Integer>();
+
+  /**
+   **/
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @JsonProperty("string_item")
+  @NotNull
+  public String getStringItem() {
+    return stringItem;
+  }
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  /**
+   **/
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @JsonProperty("number_item")
+  @NotNull
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  /**
+   **/
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @JsonProperty("integer_item")
+  @NotNull
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  /**
+   **/
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @JsonProperty("bool_item")
+  @NotNull
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  /**
+   **/
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @JsonProperty("array_item")
+  @NotNull
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs-spec-interface/src/main/openapi/openapi.yaml b/samples/server/petstore/jaxrs-spec-interface/src/main/openapi/openapi.yaml
index fc79104a6cb..49efe045cca 100644
--- a/samples/server/petstore/jaxrs-spec-interface/src/main/openapi/openapi.yaml
+++ b/samples/server/petstore/jaxrs-spec-interface/src/main/openapi/openapi.yaml
@@ -1718,6 +1718,59 @@ components:
           description: Test capitalization
           type: string
       type: object
+    TypeHolderDefault:
+      properties:
+        string_item:
+          default: what
+          type: string
+        number_item:
+          type: number
+        integer_item:
+          type: integer
+        bool_item:
+          default: true
+          type: boolean
+        array_item:
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
+    TypeHolderExample:
+      properties:
+        string_item:
+          example: what
+          type: string
+        number_item:
+          example: 1.234
+          type: number
+        integer_item:
+          example: -2
+          type: integer
+        bool_item:
+          example: true
+          type: boolean
+        array_item:
+          example:
+          - 0
+          - 1
+          - 2
+          - 3
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
   securitySchemes:
     petstore_auth:
       flows:
diff --git a/samples/server/petstore/jaxrs-spec/src/gen/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/jaxrs-spec/src/gen/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..b0cfc27703c
--- /dev/null
+++ b/samples/server/petstore/jaxrs-spec/src/gen/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,165 @@
+package org.openapitools.model;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import java.io.Serializable;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+import io.swagger.annotations.*;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+
+
+public class TypeHolderDefault  implements Serializable {
+  
+  private @Valid String stringItem = "what";
+  private @Valid BigDecimal numberItem;
+  private @Valid Integer integerItem;
+  private @Valid Boolean boolItem = true;
+  private @Valid List<Integer> arrayItem = new ArrayList<Integer>();
+
+  /**
+   **/
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("string_item")
+  @NotNull
+  public String getStringItem() {
+    return stringItem;
+  }
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  /**
+   **/
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("number_item")
+  @NotNull
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  /**
+   **/
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("integer_item")
+  @NotNull
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  /**
+   **/
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("bool_item")
+  @NotNull
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  /**
+   **/
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty("array_item")
+  @NotNull
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs-spec/src/gen/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/jaxrs-spec/src/gen/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..e7f2199029d
--- /dev/null
+++ b/samples/server/petstore/jaxrs-spec/src/gen/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,165 @@
+package org.openapitools.model;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import java.io.Serializable;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+import io.swagger.annotations.*;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+
+
+public class TypeHolderExample  implements Serializable {
+  
+  private @Valid String stringItem;
+  private @Valid BigDecimal numberItem;
+  private @Valid Integer integerItem;
+  private @Valid Boolean boolItem;
+  private @Valid List<Integer> arrayItem = new ArrayList<Integer>();
+
+  /**
+   **/
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @JsonProperty("string_item")
+  @NotNull
+  public String getStringItem() {
+    return stringItem;
+  }
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  /**
+   **/
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @JsonProperty("number_item")
+  @NotNull
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  /**
+   **/
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @JsonProperty("integer_item")
+  @NotNull
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  /**
+   **/
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @JsonProperty("bool_item")
+  @NotNull
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  /**
+   **/
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @JsonProperty("array_item")
+  @NotNull
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs-spec/src/main/openapi/openapi.yaml b/samples/server/petstore/jaxrs-spec/src/main/openapi/openapi.yaml
index fc79104a6cb..49efe045cca 100644
--- a/samples/server/petstore/jaxrs-spec/src/main/openapi/openapi.yaml
+++ b/samples/server/petstore/jaxrs-spec/src/main/openapi/openapi.yaml
@@ -1718,6 +1718,59 @@ components:
           description: Test capitalization
           type: string
       type: object
+    TypeHolderDefault:
+      properties:
+        string_item:
+          default: what
+          type: string
+        number_item:
+          type: number
+        integer_item:
+          type: integer
+        bool_item:
+          default: true
+          type: boolean
+        array_item:
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
+    TypeHolderExample:
+      properties:
+        string_item:
+          example: what
+          type: string
+        number_item:
+          example: 1.234
+          type: number
+        integer_item:
+          example: -2
+          type: integer
+        bool_item:
+          example: true
+          type: boolean
+        array_item:
+          example:
+          - 0
+          - 1
+          - 2
+          - 3
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
   securitySchemes:
     petstore_auth:
       flows:
diff --git a/samples/server/petstore/jaxrs/jersey1-useTags/src/gen/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/jaxrs/jersey1-useTags/src/gen/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2a384ca2a84
--- /dev/null
+++ b/samples/server/petstore/jaxrs/jersey1-useTags/src/gen/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,205 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs/jersey1-useTags/src/gen/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/jaxrs/jersey1-useTags/src/gen/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..d87732ad93e
--- /dev/null
+++ b/samples/server/petstore/jaxrs/jersey1-useTags/src/gen/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,205 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(example = "what", required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(example = "-2", required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(example = "true", required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs/jersey1/src/gen/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/jaxrs/jersey1/src/gen/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2a384ca2a84
--- /dev/null
+++ b/samples/server/petstore/jaxrs/jersey1/src/gen/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,205 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs/jersey1/src/gen/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/jaxrs/jersey1/src/gen/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..d87732ad93e
--- /dev/null
+++ b/samples/server/petstore/jaxrs/jersey1/src/gen/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,205 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(example = "what", required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(example = "-2", required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(example = "true", required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs/jersey2-useTags/src/gen/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/jaxrs/jersey2-useTags/src/gen/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2a384ca2a84
--- /dev/null
+++ b/samples/server/petstore/jaxrs/jersey2-useTags/src/gen/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,205 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs/jersey2-useTags/src/gen/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/jaxrs/jersey2-useTags/src/gen/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..d87732ad93e
--- /dev/null
+++ b/samples/server/petstore/jaxrs/jersey2-useTags/src/gen/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,205 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(example = "what", required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(example = "-2", required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(example = "true", required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs/jersey2/src/gen/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/jaxrs/jersey2/src/gen/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2a384ca2a84
--- /dev/null
+++ b/samples/server/petstore/jaxrs/jersey2/src/gen/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,205 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/jaxrs/jersey2/src/gen/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/jaxrs/jersey2/src/gen/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..d87732ad93e
--- /dev/null
+++ b/samples/server/petstore/jaxrs/jersey2/src/gen/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,205 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+   **/
+  @JsonProperty("string_item")
+  @ApiModelProperty(example = "what", required = true, value = "")
+    @NotNull
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+   **/
+  @JsonProperty("number_item")
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+    @NotNull
+@Valid
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+   **/
+  @JsonProperty("integer_item")
+  @ApiModelProperty(example = "-2", required = true, value = "")
+    @NotNull
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+   **/
+  @JsonProperty("bool_item")
+  @ApiModelProperty(example = "true", required = true, value = "")
+    @NotNull
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+   **/
+  @JsonProperty("array_item")
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+    @NotNull
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/php-slim/README.md b/samples/server/petstore/php-slim/README.md
index a71823a7b41..3cfeadb020e 100644
--- a/samples/server/petstore/php-slim/README.md
+++ b/samples/server/petstore/php-slim/README.md
@@ -185,6 +185,8 @@ Class | Method | HTTP request | Description
 * OpenAPIServer\Model\ReadOnlyFirst
 * OpenAPIServer\Model\SpecialModelName
 * OpenAPIServer\Model\Tag
+* OpenAPIServer\Model\TypeHolderDefault
+* OpenAPIServer\Model\TypeHolderExample
 * OpenAPIServer\Model\User
 
 
diff --git a/samples/server/petstore/php-slim/lib/Model/TypeHolderDefault.php b/samples/server/petstore/php-slim/lib/Model/TypeHolderDefault.php
new file mode 100644
index 00000000000..48082502d60
--- /dev/null
+++ b/samples/server/petstore/php-slim/lib/Model/TypeHolderDefault.php
@@ -0,0 +1,27 @@
+<?php
+/**
+ * TypeHolderDefault
+ */
+namespace OpenAPIServer\Model;
+
+/**
+ * TypeHolderDefault
+ */
+class TypeHolderDefault
+{
+    
+    /** @var string $stringItem */
+    private $stringItem;
+    
+    /** @var float $numberItem */
+    private $numberItem;
+    
+    /** @var int $integerItem */
+    private $integerItem;
+    
+    /** @var bool $boolItem */
+    private $boolItem;
+    
+    /** @var int[] $arrayItem */
+    private $arrayItem;
+}
diff --git a/samples/server/petstore/php-slim/lib/Model/TypeHolderExample.php b/samples/server/petstore/php-slim/lib/Model/TypeHolderExample.php
new file mode 100644
index 00000000000..c24a5f63246
--- /dev/null
+++ b/samples/server/petstore/php-slim/lib/Model/TypeHolderExample.php
@@ -0,0 +1,27 @@
+<?php
+/**
+ * TypeHolderExample
+ */
+namespace OpenAPIServer\Model;
+
+/**
+ * TypeHolderExample
+ */
+class TypeHolderExample
+{
+    
+    /** @var string $stringItem */
+    private $stringItem;
+    
+    /** @var float $numberItem */
+    private $numberItem;
+    
+    /** @var int $integerItem */
+    private $integerItem;
+    
+    /** @var bool $boolItem */
+    private $boolItem;
+    
+    /** @var int[] $arrayItem */
+    private $arrayItem;
+}
diff --git a/samples/server/petstore/php-slim/test/Model/TypeHolderDefaultTest.php b/samples/server/petstore/php-slim/test/Model/TypeHolderDefaultTest.php
new file mode 100644
index 00000000000..cd7015af57a
--- /dev/null
+++ b/samples/server/petstore/php-slim/test/Model/TypeHolderDefaultTest.php
@@ -0,0 +1,113 @@
+<?php
+/**
+ * TypeHolderDefaultTest
+ * PHP version 5
+ *
+ * @category Class
+ * @package  OpenAPIServer\Model
+ * @author   OpenAPI Generator team
+ * @link     https://github.com/openapitools/openapi-generator
+ */
+
+/**
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ * OpenAPI spec version: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+/**
+ * NOTE: This class is auto generated by the openapi generator program.
+ * https://github.com/openapitools/openapi-generator
+ * Please update the test case below to test the model.
+ */
+namespace OpenAPIServer\Model;
+
+use PHPUnit\Framework\TestCase;
+use OpenAPIServer\Model\TypeHolderDefault;
+
+/**
+ * TypeHolderDefaultTest Class Doc Comment
+ *
+ * @category Class
+ * @description TypeHolderDefault
+ * @package  OpenAPIServer\Model
+ * @author   OpenAPI Generator team
+ * @link     https://github.com/openapitools/openapi-generator
+ * @coversDefaultClass \OpenAPIServer\Model\TypeHolderDefault
+ */
+class TypeHolderDefaultTest extends TestCase
+{
+
+    /**
+     * Setup before running any test cases
+     */
+    public static function setUpBeforeClass()
+    {
+    }
+
+    /**
+     * Setup before running each test case
+     */
+    public function setUp()
+    {
+    }
+
+    /**
+     * Clean up after running each test case
+     */
+    public function tearDown()
+    {
+    }
+
+    /**
+     * Clean up after running all test cases
+     */
+    public static function tearDownAfterClass()
+    {
+    }
+
+    /**
+     * Test "TypeHolderDefault"
+     */
+    public function testTypeHolderDefault()
+    {
+        $testTypeHolderDefault = new TypeHolderDefault();
+    }
+
+    /**
+     * Test attribute "stringItem"
+     */
+    public function testPropertyStringItem()
+    {
+    }
+
+    /**
+     * Test attribute "numberItem"
+     */
+    public function testPropertyNumberItem()
+    {
+    }
+
+    /**
+     * Test attribute "integerItem"
+     */
+    public function testPropertyIntegerItem()
+    {
+    }
+
+    /**
+     * Test attribute "boolItem"
+     */
+    public function testPropertyBoolItem()
+    {
+    }
+
+    /**
+     * Test attribute "arrayItem"
+     */
+    public function testPropertyArrayItem()
+    {
+    }
+}
diff --git a/samples/server/petstore/php-slim/test/Model/TypeHolderExampleTest.php b/samples/server/petstore/php-slim/test/Model/TypeHolderExampleTest.php
new file mode 100644
index 00000000000..b5587aaecab
--- /dev/null
+++ b/samples/server/petstore/php-slim/test/Model/TypeHolderExampleTest.php
@@ -0,0 +1,113 @@
+<?php
+/**
+ * TypeHolderExampleTest
+ * PHP version 5
+ *
+ * @category Class
+ * @package  OpenAPIServer\Model
+ * @author   OpenAPI Generator team
+ * @link     https://github.com/openapitools/openapi-generator
+ */
+
+/**
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ * OpenAPI spec version: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+/**
+ * NOTE: This class is auto generated by the openapi generator program.
+ * https://github.com/openapitools/openapi-generator
+ * Please update the test case below to test the model.
+ */
+namespace OpenAPIServer\Model;
+
+use PHPUnit\Framework\TestCase;
+use OpenAPIServer\Model\TypeHolderExample;
+
+/**
+ * TypeHolderExampleTest Class Doc Comment
+ *
+ * @category Class
+ * @description TypeHolderExample
+ * @package  OpenAPIServer\Model
+ * @author   OpenAPI Generator team
+ * @link     https://github.com/openapitools/openapi-generator
+ * @coversDefaultClass \OpenAPIServer\Model\TypeHolderExample
+ */
+class TypeHolderExampleTest extends TestCase
+{
+
+    /**
+     * Setup before running any test cases
+     */
+    public static function setUpBeforeClass()
+    {
+    }
+
+    /**
+     * Setup before running each test case
+     */
+    public function setUp()
+    {
+    }
+
+    /**
+     * Clean up after running each test case
+     */
+    public function tearDown()
+    {
+    }
+
+    /**
+     * Clean up after running all test cases
+     */
+    public static function tearDownAfterClass()
+    {
+    }
+
+    /**
+     * Test "TypeHolderExample"
+     */
+    public function testTypeHolderExample()
+    {
+        $testTypeHolderExample = new TypeHolderExample();
+    }
+
+    /**
+     * Test attribute "stringItem"
+     */
+    public function testPropertyStringItem()
+    {
+    }
+
+    /**
+     * Test attribute "numberItem"
+     */
+    public function testPropertyNumberItem()
+    {
+    }
+
+    /**
+     * Test attribute "integerItem"
+     */
+    public function testPropertyIntegerItem()
+    {
+    }
+
+    /**
+     * Test attribute "boolItem"
+     */
+    public function testPropertyBoolItem()
+    {
+    }
+
+    /**
+     * Test attribute "arrayItem"
+     */
+    public function testPropertyArrayItem()
+    {
+    }
+}
diff --git a/samples/server/petstore/php-ze-ph/src/App/DTO/TypeHolderDefault.php b/samples/server/petstore/php-ze-ph/src/App/DTO/TypeHolderDefault.php
new file mode 100644
index 00000000000..e4e77bbcfd5
--- /dev/null
+++ b/samples/server/petstore/php-ze-ph/src/App/DTO/TypeHolderDefault.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\DTO;
+
+use Articus\DataTransfer\Annotation as DTA;
+
+/**
+ */
+class TypeHolderDefault
+{
+    /**
+     * @DTA\Data(field="string_item")
+     * @DTA\Validator(name="Type", options={"type":"string"})
+     * @var string
+     */
+    public $string_item;
+    /**
+     * @DTA\Data(field="number_item")
+     * @DTA\Validator(name="Type", options={"type":"float"})
+     * @var float
+     */
+    public $number_item;
+    /**
+     * @DTA\Data(field="integer_item")
+     * @DTA\Validator(name="Type", options={"type":"int"})
+     * @var int
+     */
+    public $integer_item;
+    /**
+     * @DTA\Data(field="bool_item")
+     * @DTA\Validator(name="Type", options={"type":"bool"})
+     * @var bool
+     */
+    public $bool_item;
+    /**
+     * @DTA\Data(field="array_item")
+     * TODO check validator and strategy are correct and can handle container item type
+     * @DTA\Validator(name="Collection", options={"validators":{
+     *     {"name":"Type", "options":{"type":"int"}}
+     * }})
+     * @var int[]
+     */
+    public $array_item;
+}
diff --git a/samples/server/petstore/php-ze-ph/src/App/DTO/TypeHolderExample.php b/samples/server/petstore/php-ze-ph/src/App/DTO/TypeHolderExample.php
new file mode 100644
index 00000000000..c1a0031686d
--- /dev/null
+++ b/samples/server/petstore/php-ze-ph/src/App/DTO/TypeHolderExample.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\DTO;
+
+use Articus\DataTransfer\Annotation as DTA;
+
+/**
+ */
+class TypeHolderExample
+{
+    /**
+     * @DTA\Data(field="string_item")
+     * @DTA\Validator(name="Type", options={"type":"string"})
+     * @var string
+     */
+    public $string_item;
+    /**
+     * @DTA\Data(field="number_item")
+     * @DTA\Validator(name="Type", options={"type":"float"})
+     * @var float
+     */
+    public $number_item;
+    /**
+     * @DTA\Data(field="integer_item")
+     * @DTA\Validator(name="Type", options={"type":"int"})
+     * @var int
+     */
+    public $integer_item;
+    /**
+     * @DTA\Data(field="bool_item")
+     * @DTA\Validator(name="Type", options={"type":"bool"})
+     * @var bool
+     */
+    public $bool_item;
+    /**
+     * @DTA\Data(field="array_item")
+     * TODO check validator and strategy are correct and can handle container item type
+     * @DTA\Validator(name="Collection", options={"validators":{
+     *     {"name":"Type", "options":{"type":"int"}}
+     * }})
+     * @var int[]
+     */
+    public $array_item;
+}
diff --git a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2e04225904d
--- /dev/null
+++ b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..097ee4ffc89
--- /dev/null
+++ b/samples/server/petstore/spring-mvc-j8-async/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2e04225904d
--- /dev/null
+++ b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..097ee4ffc89
--- /dev/null
+++ b/samples/server/petstore/spring-mvc-j8-localdatetime/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..79b2cad12ad
--- /dev/null
+++ b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..3a14e079c2e
--- /dev/null
+++ b/samples/server/petstore/spring-mvc/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..79b2cad12ad
--- /dev/null
+++ b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..3a14e079c2e
--- /dev/null
+++ b/samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2e04225904d
--- /dev/null
+++ b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..097ee4ffc89
--- /dev/null
+++ b/samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..79b2cad12ad
--- /dev/null
+++ b/samples/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..3a14e079c2e
--- /dev/null
+++ b/samples/server/petstore/springboot-delegate/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<Integer>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2e04225904d
--- /dev/null
+++ b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..097ee4ffc89
--- /dev/null
+++ b/samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2e04225904d
--- /dev/null
+++ b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..097ee4ffc89
--- /dev/null
+++ b/samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-reactive/src/main/resources/openapi.yaml b/samples/server/petstore/springboot-reactive/src/main/resources/openapi.yaml
index 60ee68c8922..08bd2c28381 100644
--- a/samples/server/petstore/springboot-reactive/src/main/resources/openapi.yaml
+++ b/samples/server/petstore/springboot-reactive/src/main/resources/openapi.yaml
@@ -1776,6 +1776,59 @@ components:
           description: Test capitalization
           type: string
       type: object
+    TypeHolderDefault:
+      properties:
+        string_item:
+          default: what
+          type: string
+        number_item:
+          type: number
+        integer_item:
+          type: integer
+        bool_item:
+          default: true
+          type: boolean
+        array_item:
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
+    TypeHolderExample:
+      properties:
+        string_item:
+          example: what
+          type: string
+        number_item:
+          example: 1.234
+          type: number
+        integer_item:
+          example: -2
+          type: integer
+        bool_item:
+          example: true
+          type: boolean
+        array_item:
+          example:
+          - 0
+          - 1
+          - 2
+          - 3
+          items:
+            type: integer
+          type: array
+      required:
+      - array_item
+      - bool_item
+      - integer_item
+      - number_item
+      - string_item
+      type: object
   securitySchemes:
     petstore_auth:
       flows:
diff --git a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2e04225904d
--- /dev/null
+++ b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..097ee4ffc89
--- /dev/null
+++ b/samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/model/TypeHolderDefault.java b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..db548295578
--- /dev/null
+++ b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.virtualan.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/model/TypeHolderExample.java b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/model/TypeHolderExample.java
new file mode 100644
index 00000000000..1ef6541bd02
--- /dev/null
+++ b/samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.virtualan.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot/src/main/java/org/openapitools/model/TypeHolderDefault.java b/samples/server/petstore/springboot/src/main/java/org/openapitools/model/TypeHolderDefault.java
new file mode 100644
index 00000000000..2e04225904d
--- /dev/null
+++ b/samples/server/petstore/springboot/src/main/java/org/openapitools/model/TypeHolderDefault.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderDefault
+ */
+
+public class TypeHolderDefault   {
+  @JsonProperty("string_item")
+  private String stringItem = "what";
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem = true;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+
diff --git a/samples/server/petstore/springboot/src/main/java/org/openapitools/model/TypeHolderExample.java b/samples/server/petstore/springboot/src/main/java/org/openapitools/model/TypeHolderExample.java
new file mode 100644
index 00000000000..097ee4ffc89
--- /dev/null
+++ b/samples/server/petstore/springboot/src/main/java/org/openapitools/model/TypeHolderExample.java
@@ -0,0 +1,193 @@
+package org.openapitools.model;
+
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+
+/**
+ * TypeHolderExample
+ */
+
+public class TypeHolderExample   {
+  @JsonProperty("string_item")
+  private String stringItem;
+
+  @JsonProperty("number_item")
+  private BigDecimal numberItem;
+
+  @JsonProperty("integer_item")
+  private Integer integerItem;
+
+  @JsonProperty("bool_item")
+  private Boolean boolItem;
+
+  @JsonProperty("array_item")
+  @Valid
+  private List<Integer> arrayItem = new ArrayList<>();
+
+  public TypeHolderExample stringItem(String stringItem) {
+    this.stringItem = stringItem;
+    return this;
+  }
+
+  /**
+   * Get stringItem
+   * @return stringItem
+  */
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @NotNull
+
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+    return this;
+  }
+
+  /**
+   * Get numberItem
+   * @return numberItem
+  */
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @NotNull
+
+  @Valid
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+    return this;
+  }
+
+  /**
+   * Get integerItem
+   * @return integerItem
+  */
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @NotNull
+
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+    return this;
+  }
+
+  /**
+   * Get boolItem
+   * @return boolItem
+  */
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @NotNull
+
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+  /**
+   * Get arrayItem
+   * @return arrayItem
+  */
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @NotNull
+
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}
+