FOS\UserBundle\Controller\GroupController::deleteAction PHP Метод

    public function deleteAction($groupname)
    {
        $group = $this->findGroupBy('name', $groupname);
        $this->container->get('fos_user.group_manager')->deleteGroup($group);
        $this->setFlash('fos_user_group_delete', 'success');
        return new RedirectResponse($this->container->get('router')->generate('fos_user_group_list'));
    }