[BUG] generated response body is always dynamic when status code is 202

[dJani97]

Describe the bug

When the response status code is 202, the response body type is not generated properly.

For example, change "200" to "202" in pet_service_json.json:

"/pet/{petId}": {
  "get": {
    "tags": [
      "pet"
    ],
    "summary": "Find pet by ID",
    "description": "Returns a single pet",
    "operationId": "getPetById",
    "produces": [
      "application/xml",
      "application/json"
    ],
    "parameters": [
      {
        "name": "petId",
        "in": "path",
        "description": "ID of pet to return",
        "required": true,
        "type": "integer",
        "format": "int64"
      }
    ],
    "responses": {
      "202": {
        "description": "successful operation",
        "schema": {
          "$ref": "#/definitions/Pet"
        }
      },
      "400": {
        "description": "Invalid ID supplied"
      },
      "404": {
        "description": "Pet not found"
      }
    },
  },

The generated code looks like this:

Future<chopper.Response> petPetIdGet //...

But it should look like this:

Future<chopper.Response<Pet>> petPetIdGet //...

The type is lost when the status is 202.

I have a swagger JSON file full of such 202 responses, and currently the only workaround is to manually replace them with 200.

Library versions used:
Latest example project

[ihadabs]

Same thing if schema was under responses.200.content.application/json.schema which is for OpenAPI 3

It should be able to handle:
responses.200.content.application/json.schema

Currently, it only handles:
responses.200.schema

Ref:
https://swagger.io/docs/specification/describing-responses/

Example:

{
   "paths":{
      "/health":{
         "get":{
            "responses":{
               "200":{
                  "description":"Default Response",
                  "content":{
                     "application/json":{
                        "schema":{
                           "type":"object",
                           "properties":{
                              "message":{
                                 "type":"string",
                                 "pattern":"ok"
                              },
                              "uptime":{
                                 "type":"number"
                              },
                              "date":{
                                 "type":"string",
                                 "format":"date-time"
                              }
                           },
                           "required":[ "message", "uptime", "date" ],
                           "additionalProperties":false
                        }
                     }
                  }
               }
            }
         }
      }
   }
}