public function isNodeVisibleToUser(NavigationNode $node)
 {
     if (!is_array($node->getVisibleFor())) {
         return true;
     }
     $security = $this->container->get('security.context');
     $token = $security->getToken();
     $visibleFor = $node->getVisibleFor();
     if (!$token instanceof \Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken) {
         $roles = array('ROLE_ANONYMUS');
     } else {
         $roles = $token->getUser()->getRoles();
     }
     return count(array_intersect($visibleFor, $roles)) > 0;
 }