title: How to exclude response validation of swagger API for images?
body: <p>I have a Swagger YAML function such as : </p>
  
  <pre><code>/acitem/image:         
      x-swagger-router-controller: image_send
      get:
        description: Returns 'image' to the caller
        operationId: imageSend
        parameters:
          - name: name
            in: query
            description: The image to be sent
            required: false
            type: string      
        responses:
          "200":
            description: Success
            schema:            
              # $ref: "#/definitions/ImageResponse"
              type: string
          default:
            description: Error
            schema:
              $ref: "#/definitions/ErrorResponse"
  </code></pre>
  
  <p>I have the Content Type Produces as :</p>
  
  <pre><code>produces:
    - application/json    
    - text/plain
    - text/html
    - image/png
  </code></pre>
  
  <p>But even after that I have swagger validation error as 
  <a href="https://i.stack.imgur.com/DJJYT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DJJYT.png" alt="enter image description here"></a></p>
  
  <p>My Question is - 
  is there an optimized method to write the image response or is there a way to exclude my image response validation ???</p>
  
  <p>Thanks in advance.</p>