private static bool _IsItemOwned(string sku)
    {
        Enhance.InitializeEnhance();

#if UNITY_EDITOR
        return(FGLEditorInternals.IsItemOwned(sku));
#elif UNITY_ANDROID
        return(FGLAndroidInternals.IsItemOwned(sku));
#elif UNITY_IOS
        return(FGLiOSInternals.IsItemOwned(sku));
#else
        return(false);
#endif
    }