void ShowRewardedAdImpl(string decisionPoint)
 {
     if (manager == null)
     {
         Logger.LogWarning("RegisterForAds must be called before calling trying to show ads");
         this.DidFailToOpenRewardedAd("Not registered");
     }
     else if (String.IsNullOrEmpty(decisionPoint))
     {
         Logger.LogInfo("Showing rewarded ad");
         manager.ShowRewardedAd();
     }
     else
     {
         Logger.LogInfo("Showing rewarded ad for " + decisionPoint);
         manager.ShowRewardedAd(decisionPoint);
     }
 }
 internal void ShowRewardedAd(Engagement engagement)
 {
     manager.ShowRewardedAd(engagement);
 }