 
         private static const EXTENSION_ID:String = "com.freshplanet.ane.AirPushNotification";
         private static var _instance:PushNotification = null;
-        private var _context:ExtensionContext = null;
 
         /**
          * "private" singleton constructor

				return;

			if (_isAndroid())
                _context.call("registerPush", projectId);
			else if(_isIOS())
				_context.call("registerPush", iOSNotificationCategories != null ? JSON.stringify(iOSNotificationCategories) : null);
		}

        /**

        public function storeTrackingNotifUrl(url:String, appGroupId:String):void {

            if (isSupported)
                callContext("storeNotifTrackingInfo", url, appGroupId);
        }

		/**
