public function onDisplayDesktopContactTool(DisplayToolEvent $event)
    {
        $content = $this->templating->render(
            'ClarolineCoreBundle:tool:contacts.html.twig', [
                'options' => $this->contactManager->getUserOptions(
                    $this->tokenStorage->getToken()->getUser()
                ),
            ]
        );

        $event->setContent($content);
        $event->stopPropagation();
    }