public static function manifestEvent()
    {
        $args     = func_get_args();
        $callback = array_shift($args);

        if (Arr::key($callback, self::$_eventList)) {
            $callbacks = self::$_eventList[$callback];
            foreach ($callbacks as $method) {
                call_user_func_array($method, $args);
            }
        }
    }