private static void interstitialClickCallback(IntPtr interstitialHandlePtr, string networkName)
        {
            GCHandle interstitialHandle = (GCHandle)interstitialHandlePtr;
            AMRInterstitialViewDelegate delegateObject = interstitialHandle.Target as AMRInterstitialViewDelegate;

            delegateObject.didClickInterstitial(networkName);
        }
 void onAdClicked(string networkName)
 {
     delegateObj.didClickInterstitial(networkName);
 }