serialize method
Implementation
@override
ByteData serialize() {
var data_ = ByteData(mavlinkEncodedLength);
data_.setUint16(0, paramCount, Endian.little);
data_.setUint16(2, paramIndexFirst, Endian.little);
data_.setUint16(4, flags, Endian.little);
data_.setUint8(6, paramArrayLen);
MavlinkMessage.setUint8List(data_, 7, packetBuf);
return data_;
}