public static void Initialize(string appKey)
        {
            __initialize(appKey);

            LifeCycleListener = new OnLifeCycleListener();
            __setLifeCycleCallbacks(OfferwallOpen, OfferwallClosed);
        }
        public static void Initialize(string appKey)
        {
            PluginClass.CallStatic("initialize", new object[2] {
                getContext(), appKey
            });

            LifeCycleListener = new OnLifeCycleListener();
            PluginClass.CallStatic("setLifeCycleListener", LifeCycleListener);
        }