Psecio\Gatekeeper\Gatekeeper::restrict PHP Method

    public static function restrict($type, array $config)
    {
        $classNs = '\\Psecio\\Gatekeeper\\Restrict\\' . ucwords(strtolower($type));
        if (!class_exists($classNs)) {
            throw new \InvalidArgumentException('Restriction type "' . $type . '" is invalid');
        }
        $instance = new $classNs($config);
        self::$restrictions[] = $instance;
    }