private static function driver()
    {
        $options = config('cache.options');

        $driver = config('cache.default');

        switch ($driver) {
            case 'file':
                    return instance(FileDriver::class);
                break;

            case 'apc':
                    return instance(ApcDriver::class);
                break;

            case 'database':
                    return instance(PDODriver::class);
                break;

            default:
                    exception(DriverNotFoundException::class);
                break;
        }
    }