public function load(ObjectManager $manager)
 {
     $project = new Project();
     $project->setLabel('Project one')->setSummary('Its first test project')->setCode('project-one')->addUser($this->getReference('user_admin'));
     $manager->persist($project);
     $projectTwo = new Project();
     $projectTwo->setLabel('Project two')->setSummary('Its second test project')->setCode('project-two')->addUser($this->getReference('user_manager'));
     $manager->persist($projectTwo);
     $projectThree = new Project();
     $projectThree->setLabel('Project three')->setSummary('Its third test project')->setCode('project-three')->addUser($this->getReference('user_operator'));
     $manager->persist($projectThree);
     $manager->flush();
     $this->addReference('project_one', $project);
     $this->addReference('project_two', $projectTwo);
     $this->addReference('project_three', $projectThree);
 }