private static extern IntPtr NativeSceneListener_Create(FindVisibleCallback preFind, FindVisibleCallback postFind
#if FULL_AOT_COMPILE
                                                                , IntPtr instanceHandle
#endif
                                                                );
 static CallbackHandler()
 {
     preFind  = new FindVisibleCallback(preFindStatic);
     postFind = new FindVisibleCallback(postFindStatic);
 }