private static extern void UnionPlatform_ExpressBannersAd_Load( string slotID, float width, float height, ExpressAd_OnLoad onLoad, ExpressAd_OnLoadError onLoadError, int context);
private static extern void UnionPlatform_ExpressInterstitialsAd_Load( string slotID, float width, float height, bool isSupportDeepLink, ExpressAd_OnLoad onLoad, ExpressAd_OnLoadError onLoadError, int context);
private static extern void UnionPlatform_ExpressAd_Load( int context, string slotID, float width, float height, int adCount, ExpressAd_OnLoad onLoad, ExpressAd_OnLoadError onLoadError);