public function editTemplate(Request $request, ParameterBagInterface $bag, $id)
    {
        // Find Template
        $mailTemplate = $this
            ->getDoctrine()
            ->getRepository($this->getParameter('pd_mailer.mail_template_class'))
            ->findOneBy(['id' => $id]);
        if (!$mailTemplate) throw $this->createNotFoundException();

        // Create Form
        $form = $this->createForm($this->getParameter('pd_mailer.mail_template_type'), $mailTemplate, ['parameters' => $bag]);

        // Handle Request
        $form->handleRequest($request);

        // Submit & Valid Form
        if ($form->isSubmitted() && $form->isValid()) {
            // Save
            $em = $this->getDoctrine()->getManager();
            $em->persist($mailTemplate);
            $em->flush();

            // Message
            $this->addFlash('success', 'changes_saved');
        }

        // Render Page
        return $this->render('@PdMailer/template.html.twig', [
            'form' => $form->createView(),
            'objects' => @unserialize($mailTemplate->getTemplateData()),
            'title' => 'mail_manager_template_edit',
            'description' => 'mail_manager_template_edit_desc',
            'base_template' => $this->getParameter('pd_mailer.base_template')
        ]);
    }