public function load(ObjectManager $manager)
 {
     $user = $manager->getRepository('ClarolineCoreBundle:User')->findOneById(1);
     $resourceType = $manager->getRepository('ClarolineCoreBundle:Resource\\ResourceType')->findOneByName('ujm_exercise');
     $ws = $manager->getRepository('ClarolineCoreBundle:Workspace\\Workspace')->findOneById(2);
     $guid = $this->container->get('claroline.utilities.misc')->generateGuid();
     $node = new ResourceNode();
     $node->setResourceType($resourceType);
     $node->setCreator($user);
     $node->setCreationDate(new \Datetime());
     $node->setName('ExoFIX Title 1');
     $node->setWorkspace($ws);
     $node->setMimeType('custom/ujm_exercise');
     $node->setPublished(true);
     $node->setActive(true);
     $node->setClass('UJM\\ExoBundle\\Entity\\Exercise');
     $node->setGuid($guid);
     /*
             $rn->setParent();
     */
     $manager->persist($node);
     $manager->flush();
     $this->addReference('rn1', $node);
 }