public function render(Modal $modal, $template = 'EkynaCoreBundle:Modal:modal.xml.twig')
    {
        $response = new Response();

        // Translations
        $modal->setTitle($this->translator->trans($modal->getTitle()));
        $buttons = $modal->getButtons();
        foreach($buttons as &$button) {
            $button['label'] = $this->translator->trans($button['label']);
        }
        $modal->setButtons($buttons);

        $response->setContent($this->twig->render($template, ['modal' => $modal]));

        $response->headers->add(['Content-Type' => 'application/xml; charset='.strtolower($this->charset)]);

        return $response;
    }