initialize static method
void
initialize()
Implementation
static void initialize() {
YandexAdsApi().initialize();
FlutterYandexAdsAppOpen.setup(FlutterYandexAdsAppOpenCallbacks());
FlutterYandexAdsInterstitial.setup(FlutterYandexAdsInterstitialCallbacks());
FlutterYandexAdsRewarded.setup(FlutterYandexAdsRewardedCallbacks());
}