public static function queue($enable = null, $handler = null)
    {
        if ($enable === null && $handler === null) {
            return self::$enableQueue;
        }
        if (is_callable($enable)) {
            $handler = $enable;
            $enable = true;
        }
        self::$enableQueue = (bool) $enable;
        if (is_callable($handler)) {
            self::$howToUseQueue = $handler;
        }

        return self::$enableQueue;
    }