serialize method
Implementation
@override
ByteData serialize() {
var data_ = ByteData(mavlinkEncodedLength);
data_.setUint32(0, size, Endian.little);
data_.setUint32(4, crc, Endian.little);
data_.setUint8(8, targetSystem);
data_.setUint8(9, targetComponent);
return data_;
}