Layout constructor
Implementation
factory Layout({
  double? x,
  double? y,
  double? width,
  double? height,
}) {
  final _result = create();
  if (x != null) {
    _result.x = x;
  }
  if (y != null) {
    _result.y = y;
  }
  if (width != null) {
    _result.width = width;
  }
  if (height != null) {
    _result.height = height;
  }
  return _result;
}