serialize method
Implementation
@override
ByteData serialize() {
var data_ = ByteData(mavlinkEncodedLength);
data_.setUint8(0, targetSystem);
data_.setUint8(1, targetComponent);
data_.setUint8(2, instance);
data_.setUint8(3, pattern);
data_.setUint8(4, customLen);
MavlinkMessage.setUint8List(data_, 5, customBytes);
return data_;
}