code: func (res *MCResponse) Transmit(w io.Writer) (n int, err error) {
  	if len(res.Body) < 128 {
  		n, err = w.Write(res.Bytes())
  	} else {
  		n, err = w.Write(res.HeaderBytes())
  		if err == nil {
  			m := 0
  			m, err = w.Write(res.Body)
  			m += n
  		}
  	}
  	return
  }
docs: // Send this response message across a writer.