protected static function getListenersSortByPriority(String $eventName) : Array
    {
        if ( ! isset(Properties::$listeners[$eventName]))
		{
			return [];
        }
        
        array_multisort(Properties::$listeners[$eventName][0], SORT_NUMERIC, Properties::$listeners[$eventName][1]);

        return Properties::$listeners[$eventName][1];
    }