serialize method
Implementation
@override
ByteData serialize() {
var data_ = ByteData(mavlinkEncodedLength);
data_.setUint64(0, timeUsec, Endian.little);
data_.setUint32(8, uptimeSec, Endian.little);
data_.setUint16(12, vendorSpecificStatusCode, Endian.little);
data_.setUint8(14, health);
data_.setUint8(15, mode);
data_.setUint8(16, subMode);
return data_;
}