public static int Pvr_GSASetCallbackShrink(SafeAreaCallbackShrink cb)
        {
            int ret = -1;

#if UNITY_ANDROID && !UNITY_EDITOR
            ret = GSASetCallbackShrink(cb);
#endif
            return(ret);
        }
 private static extern int GSASetCallbackShrink(SafeAreaCallbackShrink cb);