code: func (resp *Response) GetWriter() (writer io.Writer) {
  	writer = resp.writer
  	if writer == nil {
  		if w, e := resp.Out.Server.Get(ENGINE_WRITER); e == nil {
  			writer, resp.writer = w.(io.Writer), w.(io.Writer)
  		}
  	}
  
  	return
  }
docs: // Return the writer