public static void start(string publisher_id, int options)
{
#if UNITY_ANDROID
HeyzapAdsAndroid.start(publisher_id, options);
#endif
#if UNITY_IPHONE
HeyzapAdsIOS.start(publisher_id, options);
#endif
HeyzapAds.initReceiver();
HZInterstitialAd.initReceiver();
HZVideoAd.initReceiver();
HZIncentivizedAd.initReceiver();
}