setGUID method
Create GUID from common {FDD39AD0-238F-46AF-ADB4-6C85480369C7} format
Implementation
void setGUID(String guidString) {
final byteBuffer = Guid.parse(guidString).bytes.buffer;
Data1 = byteBuffer.asUint32List(0).first;
Data2 = byteBuffer.asUint16List(4).first;
Data3 = byteBuffer.asUint16List(6).first;
Data4 = byteBuffer.asUint64List(8).first;
}