public function menu(\Twig_Environment $env, $identifier = '', $template = '_sub_menu.twig', $params = [], $safe)
{
if ($safe) {
return null;
}
/** @var \Bolt\Menu\Menu $menu */
$menu = $this->app['menu']->menu($identifier);
$twigvars = ['name' => $menu->getName(), 'menu' => $menu->getItems()];
$twigvars += (array) $params;
return $env->render($template, $twigvars);
}