viewIfLoaded property

Implementation

UIView? get viewIfLoaded {
  objc.checkOsVersionInternal('UIViewController.viewIfLoaded', iOS: (false, (9, 0, 0)));
  final _ret = _objc_msgSend_151sglz(this.ref.pointer, _sel_viewIfLoaded);
  return _ret.address == 0 ? null : UIView.castFromPointer(_ret, retain: true, release: true);
}