code: func (m *Memberlist) SendTo(to net.Addr, msg []byte) error {
  	// Encode as a user message
  	buf := make([]byte, 1, len(msg)+1)
  	buf[0] = byte(userMsg)
  	buf = append(buf, msg...)
  
  	// Send the message
  	return m.rawSendMsgPacket(to.String(), nil, buf)
  }
docs: // SendTo is deprecated in favor of SendBestEffort, which requires a node to
  // target.