public static function create(array $options) {
        $formatterClass = ucfirst(!empty($options['driverOptions']['format']) ? $options['driverOptions']['format'] : 'json');
        $className      = preg_match('/\\\\/', $formatterClass) ? $formatterClass : 'Circle\DoctrineRestDriver\Formatters\\' . $formatterClass;
        Assertions::assertClassExists($className);

        return self::assert(new $className($options));
    }