toUUID method
Implementation
UUID toUUID() {
  ByteLayer layer = ByteLayer();
  layer.writeLong(MSB);
  layer.writeLong(LSB);
  layer.resetPosition();
  return UUID(layer.readBytes(16));
}
UUID toUUID() {
  ByteLayer layer = ByteLayer();
  layer.writeLong(MSB);
  layer.writeLong(LSB);
  layer.resetPosition();
  return UUID(layer.readBytes(16));
}