protected function notifyWarning($content) {
        $notification = NotificationFactory::newWarningNotification($content);
        return $this->notify(NotificationEvents::NOTIFICATION_WARNING, $notification);
    }
protected function notifyWarning($content) {
        $notification = NotificationFactory::newWarningNotification($content);
        return $this->notify(NotificationEvents::NOTIFICATION_WARNING, $notification);
    }
protected function notifyWarning ( $ content ) { $ notification = NotificationFactory :: newWarningNotification ( $ content ) ; return $ this -> notify ( NotificationEvents :: NOTIFICATION_WARNING , $ notification ) ; }
Notify "warning".

@param string $content The content.
@return Event Returns the event.
Notify warning .