public static function integrationWebpayNormal()
    {
        $private_key = dirname(__FILE__) . '/certs/webpay-plus-integration/597020000541.key';
        $client_certificate = dirname(__FILE__) . '/certs/webpay-plus-integration/597020000541.crt';

        return new CertificationBag($private_key, $client_certificate, null, CertificationBag::INTEGRATION);
    }