add parameter name mapping (#16160)

samples/client/petstore/java/okhttp-gson/api/openapi.yaml

@@ -1132,6 +1132,42 @@ paths:
       tags:
       - fake
       x-accepts: application/json
+  /fake/parameter-name-mapping:
+    get:
+      operationId: getParameterNameMapping
+      parameters:
+      - description: _type
+        explode: false
+        in: header
+        name: _type
+        required: true
+        schema:
+          format: int64
+          type: integer
+        style: simple
+      - description: type
+        explode: true
+        in: query
+        name: type
+        required: true
+        schema:
+          type: string
+        style: form
+      - description: type_
+        explode: false
+        in: header
+        name: type_
+        required: true
+        schema:
+          type: string
+        style: simple
+      responses:
+        "200":
+          description: OK
+      summary: parameter name mapping test
+      tags:
+      - fake
+      x-accepts: application/json
   /values:
     get:
       description: ""