/**
* Show interstitial ad
*/
public static void ShowInterstitialAd(string placement = INTERSTITIAL_PLACEMENT_DEFAULT)
{
InitializeEnhance();
#if UNITY_EDITOR
FGLEditorInternals.ShowInterstitialAd(placement);
#elif UNITY_ANDROID
FGLAndroidInternals.ShowInterstitialAd(placement);
#elif UNITY_IOS
FGLiOSInternals.ShowInterstitialAd(placement);
#endif
}