diff --git a/samples/client/petstore/R/NAMESPACE b/samples/client/petstore/R/NAMESPACE
index c38dd450a16..42af616b975 100644
--- a/samples/client/petstore/R/NAMESPACE
+++ b/samples/client/petstore/R/NAMESPACE
@@ -7,8 +7,6 @@ export(ApiResponse)
 
 # Models
 export(Category)
-export(InlineObject)
-export(InlineObject1)
 export(ModelApiResponse)
 export(Order)
 export(Pet)
diff --git a/samples/client/petstore/R/R/pet_api.R b/samples/client/petstore/R/R/pet_api.R
index b84d12ffc5f..224ee31243a 100644
--- a/samples/client/petstore/R/R/pet_api.R
+++ b/samples/client/petstore/R/R/pet_api.R
@@ -56,17 +56,17 @@ PetApi <- R6::R6Class(
         self$apiClient <- ApiClient$new()
       }
     },
-    AddPet = function(pet, ...){
+    AddPet = function(body, ...){
       args <- list(...)
       queryParams <- list()
       headerParams <- c()
 
-      if (missing(`pet`)) {
-        stop("Missing required parameter `pet`.")
+      if (missing(`body`)) {
+        stop("Missing required parameter `body`.")
       }
 
-      if (!missing(`pet`)) {
-        body <- `pet`$toJSONString()
+      if (!missing(`body`)) {
+        body <- `body`$toJSONString()
       } else {
         body <- NULL
       }
@@ -223,17 +223,17 @@ PetApi <- R6::R6Class(
       }
 
     },
-    UpdatePet = function(pet, ...){
+    UpdatePet = function(body, ...){
       args <- list(...)
       queryParams <- list()
       headerParams <- c()
 
-      if (missing(`pet`)) {
-        stop("Missing required parameter `pet`.")
+      if (missing(`body`)) {
+        stop("Missing required parameter `body`.")
       }
 
-      if (!missing(`pet`)) {
-        body <- `pet`$toJSONString()
+      if (!missing(`body`)) {
+        body <- `body`$toJSONString()
       } else {
         body <- NULL
       }
diff --git a/samples/client/petstore/R/R/store_api.R b/samples/client/petstore/R/R/store_api.R
index 8c1ad82985c..9c6db7193a8 100644
--- a/samples/client/petstore/R/R/store_api.R
+++ b/samples/client/petstore/R/R/store_api.R
@@ -133,17 +133,17 @@ StoreApi <- R6::R6Class(
       }
 
     },
-    PlaceOrder = function(order, ...){
+    PlaceOrder = function(body, ...){
       args <- list(...)
       queryParams <- list()
       headerParams <- c()
 
-      if (missing(`order`)) {
-        stop("Missing required parameter `order`.")
+      if (missing(`body`)) {
+        stop("Missing required parameter `body`.")
       }
 
-      if (!missing(`order`)) {
-        body <- `order`$toJSONString()
+      if (!missing(`body`)) {
+        body <- `body`$toJSONString()
       } else {
         body <- NULL
       }
diff --git a/samples/client/petstore/R/R/user_api.R b/samples/client/petstore/R/R/user_api.R
index cbc85ed69dc..0c676509ed9 100644
--- a/samples/client/petstore/R/R/user_api.R
+++ b/samples/client/petstore/R/R/user_api.R
@@ -56,17 +56,17 @@ UserApi <- R6::R6Class(
         self$apiClient <- ApiClient$new()
       }
     },
-    CreateUser = function(user, ...){
+    CreateUser = function(body, ...){
       args <- list(...)
       queryParams <- list()
       headerParams <- c()
 
-      if (missing(`user`)) {
-        stop("Missing required parameter `user`.")
+      if (missing(`body`)) {
+        stop("Missing required parameter `body`.")
       }
 
-      if (!missing(`user`)) {
-        body <- `user`$toJSONString()
+      if (!missing(`body`)) {
+        body <- `body`$toJSONString()
       } else {
         body <- NULL
       }
@@ -89,17 +89,17 @@ UserApi <- R6::R6Class(
       }
 
     },
-    CreateUsersWithArrayInput = function(user, ...){
+    CreateUsersWithArrayInput = function(body, ...){
       args <- list(...)
       queryParams <- list()
       headerParams <- c()
 
-      if (missing(`user`)) {
-        stop("Missing required parameter `user`.")
+      if (missing(`body`)) {
+        stop("Missing required parameter `body`.")
       }
 
-      if (!missing(`user`)) {
-        body <- `user`$toJSONString()
+      if (!missing(`body`)) {
+        body <- `body`$toJSONString()
       } else {
         body <- NULL
       }
@@ -122,17 +122,17 @@ UserApi <- R6::R6Class(
       }
 
     },
-    CreateUsersWithListInput = function(user, ...){
+    CreateUsersWithListInput = function(body, ...){
       args <- list(...)
       queryParams <- list()
       headerParams <- c()
 
-      if (missing(`user`)) {
-        stop("Missing required parameter `user`.")
+      if (missing(`body`)) {
+        stop("Missing required parameter `body`.")
       }
 
-      if (!missing(`user`)) {
-        body <- `user`$toJSONString()
+      if (!missing(`body`)) {
+        body <- `body`$toJSONString()
       } else {
         body <- NULL
       }
@@ -275,7 +275,7 @@ UserApi <- R6::R6Class(
       }
 
     },
-    UpdateUser = function(username, user, ...){
+    UpdateUser = function(username, body, ...){
       args <- list(...)
       queryParams <- list()
       headerParams <- c()
@@ -284,12 +284,12 @@ UserApi <- R6::R6Class(
         stop("Missing required parameter `username`.")
       }
 
-      if (missing(`user`)) {
-        stop("Missing required parameter `user`.")
+      if (missing(`body`)) {
+        stop("Missing required parameter `body`.")
       }
 
-      if (!missing(`user`)) {
-        body <- `user`$toJSONString()
+      if (!missing(`body`)) {
+        body <- `body`$toJSONString()
       } else {
         body <- NULL
       }
diff --git a/samples/client/petstore/R/README.md b/samples/client/petstore/R/README.md
index dd1671cf8a0..bdff66e39bc 100644
--- a/samples/client/petstore/R/README.md
+++ b/samples/client/petstore/R/README.md
@@ -81,8 +81,6 @@ Class | Method | HTTP request | Description
 ## Documentation for Models
 
  - [Category](docs/Category.md)
- - [InlineObject](docs/InlineObject.md)
- - [InlineObject1](docs/InlineObject1.md)
  - [ModelApiResponse](docs/ModelApiResponse.md)
  - [Order](docs/Order.md)
  - [Pet](docs/Pet.md)
diff --git a/samples/client/petstore/R/docs/PetApi.md b/samples/client/petstore/R/docs/PetApi.md
index 3b313d95737..82e44deaa97 100644
--- a/samples/client/petstore/R/docs/PetApi.md
+++ b/samples/client/petstore/R/docs/PetApi.md
@@ -15,7 +15,7 @@ Method | HTTP request | Description
 
 
 # **AddPet**
-> AddPet(pet)
+> AddPet(body)
 
 Add a new pet to the store
 
@@ -23,20 +23,20 @@ Add a new pet to the store
 ```R
 library(petstore)
 
-var.pet <- Pet$new() # Pet | Pet object that needs to be added to the store
+var.body <- Pet$new() # Pet | Pet object that needs to be added to the store
 
 #Add a new pet to the store
 api.instance <- PetApi$new()
 # Configure OAuth2 access token for authorization: petstore_auth
 api.instance$apiClient$accessToken <- 'TODO_YOUR_ACCESS_TOKEN';
-api.instance$AddPet(var.pet)
+api.instance$AddPet(var.body)
 ```
 
 ### Parameters
 
 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
 
@@ -221,7 +221,7 @@ Name | Type | Description  | Notes
 
 
 # **UpdatePet**
-> UpdatePet(pet)
+> UpdatePet(body)
 
 Update an existing pet
 
@@ -229,20 +229,20 @@ Update an existing pet
 ```R
 library(petstore)
 
-var.pet <- Pet$new() # Pet | Pet object that needs to be added to the store
+var.body <- Pet$new() # Pet | Pet object that needs to be added to the store
 
 #Update an existing pet
 api.instance <- PetApi$new()
 # Configure OAuth2 access token for authorization: petstore_auth
 api.instance$apiClient$accessToken <- 'TODO_YOUR_ACCESS_TOKEN';
-api.instance$UpdatePet(var.pet)
+api.instance$UpdatePet(var.body)
 ```
 
 ### Parameters
 
 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/R/docs/StoreApi.md b/samples/client/petstore/R/docs/StoreApi.md
index ae038a43c81..395b10ebd10 100644
--- a/samples/client/petstore/R/docs/StoreApi.md
+++ b/samples/client/petstore/R/docs/StoreApi.md
@@ -128,7 +128,7 @@ No authorization required
 
 
 # **PlaceOrder**
-> Order PlaceOrder(order)
+> Order PlaceOrder(body)
 
 Place an order for a pet
 
@@ -136,11 +136,11 @@ Place an order for a pet
 ```R
 library(petstore)
 
-var.order <- Order$new() # Order | order placed for purchasing the pet
+var.body <- Order$new() # Order | order placed for purchasing the pet
 
 #Place an order for a pet
 api.instance <- StoreApi$new()
-result <- api.instance$PlaceOrder(var.order)
+result <- api.instance$PlaceOrder(var.body)
 dput(result)
 ```
 
@@ -148,7 +148,7 @@ dput(result)
 
 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
 
@@ -160,7 +160,7 @@ No authorization required
 
 ### HTTP request headers
 
- - **Content-Type**: application/json
+ - **Content-Type**: Not defined
  - **Accept**: application/xml, application/json
 
 
diff --git a/samples/client/petstore/R/docs/UserApi.md b/samples/client/petstore/R/docs/UserApi.md
index db5d0e9bc44..a63c8f691e9 100644
--- a/samples/client/petstore/R/docs/UserApi.md
+++ b/samples/client/petstore/R/docs/UserApi.md
@@ -15,7 +15,7 @@ Method | HTTP request | Description
 
 
 # **CreateUser**
-> CreateUser(user)
+> CreateUser(body)
 
 Create user
 
@@ -25,18 +25,18 @@ This can only be done by the logged in user.
 ```R
 library(petstore)
 
-var.user <- User$new() # User | Created user object
+var.body <- User$new() # User | Created user object
 
 #Create user
 api.instance <- UserApi$new()
-api.instance$CreateUser(var.user)
+api.instance$CreateUser(var.body)
 ```
 
 ### Parameters
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **user** | [**User**](User.md)| Created user object | 
+ **body** | [**User**](User.md)| Created user object | 
 
 ### Return type
 
@@ -48,13 +48,13 @@ No authorization required
 
 ### HTTP request headers
 
- - **Content-Type**: application/json
+ - **Content-Type**: Not defined
  - **Accept**: Not defined
 
 
 
 # **CreateUsersWithArrayInput**
-> CreateUsersWithArrayInput(user)
+> CreateUsersWithArrayInput(body)
 
 Creates list of users with given input array
 
@@ -62,18 +62,18 @@ Creates list of users with given input array
 ```R
 library(petstore)
 
-var.user <- [array$new()] # User | List of user object
+var.body <- [array$new()] # User | List of user object
 
 #Creates list of users with given input array
 api.instance <- UserApi$new()
-api.instance$CreateUsersWithArrayInput(var.user)
+api.instance$CreateUsersWithArrayInput(var.body)
 ```
 
 ### Parameters
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **user** | [**User**](array.md)| List of user object | 
+ **body** | [**User**](array.md)| List of user object | 
 
 ### Return type
 
@@ -85,13 +85,13 @@ No authorization required
 
 ### HTTP request headers
 
- - **Content-Type**: application/json
+ - **Content-Type**: Not defined
  - **Accept**: Not defined
 
 
 
 # **CreateUsersWithListInput**
-> CreateUsersWithListInput(user)
+> CreateUsersWithListInput(body)
 
 Creates list of users with given input array
 
@@ -99,18 +99,18 @@ Creates list of users with given input array
 ```R
 library(petstore)
 
-var.user <- [array$new()] # User | List of user object
+var.body <- [array$new()] # User | List of user object
 
 #Creates list of users with given input array
 api.instance <- UserApi$new()
-api.instance$CreateUsersWithListInput(var.user)
+api.instance$CreateUsersWithListInput(var.body)
 ```
 
 ### Parameters
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **user** | [**User**](array.md)| List of user object | 
+ **body** | [**User**](array.md)| List of user object | 
 
 ### Return type
 
@@ -122,7 +122,7 @@ No authorization required
 
 ### HTTP request headers
 
- - **Content-Type**: application/json
+ - **Content-Type**: Not defined
  - **Accept**: Not defined
 
 
@@ -278,7 +278,7 @@ No authorization required
 
 
 # **UpdateUser**
-> UpdateUser(username, user)
+> UpdateUser(username, body)
 
 Updated user
 
@@ -289,11 +289,11 @@ This can only be done by the logged in user.
 library(petstore)
 
 var.username <- 'username_example' # character | name that need to be deleted
-var.user <- User$new() # User | Updated user object
+var.body <- User$new() # User | Updated user object
 
 #Updated user
 api.instance <- UserApi$new()
-api.instance$UpdateUser(var.username, var.user)
+api.instance$UpdateUser(var.username, var.body)
 ```
 
 ### Parameters
@@ -301,7 +301,7 @@ api.instance$UpdateUser(var.username, var.user)
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
  **username** | **character**| name that need to be deleted | 
- **user** | [**User**](User.md)| Updated user object | 
+ **body** | [**User**](User.md)| Updated user object | 
 
 ### Return type
 
@@ -313,7 +313,7 @@ No authorization required
 
 ### HTTP request headers
 
- - **Content-Type**: application/json
+ - **Content-Type**: Not defined
  - **Accept**: Not defined