code: func (ble *BLE) sendCBMsg(id int, args xpc.Dict) {
  	message := xpc.Dict{"kCBMsgId": id, "kCBMsgArgs": args}
  	if ble.verbose {
  		log.Printf("sendCBMsg %#v\n", message)
  	}
  
  	ble.conn.Send(xpc.Dict{"kCBMsgId": id, "kCBMsgArgs": args}, ble.verbose)
  }
docs: // send a message to Blued