title: Should NOT have additional properties additionalProperty content
body: <p>I need some help with my swagger.json file. Namely I need different various of content(application/json + application/xml). So when I try to add this I have this error - &quot;Should NOT have additional properties additionalProperty content&quot;
  I need this various not only in &quot;response&quot; field but also in &quot;parameter content type&quot; field</p>
  <p>My swagger.json:</p>
  <pre><code>swagger: '2.0'
  info:
    description: Сервер позволяет переводить текст с одного языка на язык
    title: Переводчик
    contact: {}
    version: '2.0'
  paths:
    /api/v1/translate/{langFrom}/{langTo}:
      post:
        tags:
          - API
        summary: Получить список доступных языков
        description: ''
        parameters:
          - name: langFrom
            in: path
            description: Выберите язык с которого перевести текст. Языки:english
            required: true
            type: string
          - name: langTo
            in: path
            description: Выберите на какой язык перевести текст. Языки:english
            required: true
            type: string
          - name: Текст перевода
            in: body
            description: Вставьте текст для перевода
            required: true
        responses:
          '200':
            description: Успешно
          '429':
             description: Очередь заполнилась. Все вычислительные ресурсы заняты. Надо подождать и послать запрос заново.
          '500':
             description: Ошибка
    /api/v1/langlist:
      get:
        produces:
         - application/json
        tags:
          - API
        summary: Получить список доступных языков
        description: ''
        responses:
          '200':
            description: Успешно
            content:  # Response body
              application/json:   # One of media types
                schema:
                  type: object
                  properties:
                    id:
                      type: integer
                    name:
                      type: string
                    fullTime: 
                      type: boolean
              application/xml:    # Another media types
                schema:
                  type: object
                  properties:
                    id:
                      type: integer
                    name:
                      type: string
                    fullTime: 
                      type: boolean
          '500':
             description: Ошибка                                                    
  definitions:
    From:
      type: object
      properties:
        id:
          type: string
          example: &quot;english&quot;
          description: &quot;id of the language&quot;
        name:
          type: string
          example: &quot;Английский&quot;
          description: &quot;name of the language&quot;
        icon:
          type: string
          example: &quot;assets/img/flags/english.png&quot;
          description: &quot;icon of the language&quot;
    To:
      type: object
      properties:
        id:
          type: string
          example: &quot;russian&quot;
          description: &quot;id of the language&quot;
        name:
          type: string
          example: &quot;Русский&quot;
          description: &quot;name of the language&quot;
        icon:
          type: string
          example: &quot;assets/img/flags/russian.png&quot;
          description: &quot;icon of the language&quot;
  
    Get:
      type: object
      required:
        - name
        - icon
      properties:
        From:
          $ref: '#/definitions/From'
        To:
          $ref: '#/definitions/To'
  
  </code></pre>
  <p>Hope for your help</p>