serialize method
Implementation
@override
ByteData serialize() {
var data_ = ByteData(mavlinkEncodedLength);
data_.setUint64(0, timeUsec, Endian.little);
MavlinkMessage.setFloat32List(data_, 8, controls);
data_.setUint8(40, groupMlx);
data_.setUint8(41, targetSystem);
data_.setUint8(42, targetComponent);
return data_;
}