code: func (resp *Response) Write(w *bufio.Writer) error {
  	sendBody := !resp.mustSkipBody()
  
  	if resp.bodyStream != nil {
  		return resp.writeBodyStream(w, sendBody)
  	}
  
  	body := resp.bodyBytes()
  	bodyLen := len(body)
  	if sendBody || bodyLen > 0 {
  		resp.Header.SetContentLength(bodyLen)
  	}
  	if err := resp.Header.Write(w); err != nil {
  		return err
  	}
  	if sendBody {
  		if _, err := w.Write(body); err != nil {
  			return err
  		}
  	}
  	return nil
  }
docs: // Write writes response to w.
  //
  // Write doesn't flush response to w for performance reasons.
  //
  // See also WriteTo.