public function load(ObjectManager $manager)
 {
     $data = $this->container->get('ilioscore.dataloader.programYearSteward')->getAll();
     foreach ($data as $arr) {
         $entity = new ProgramYearSteward();
         $entity->setId($arr['id']);
         $manager->persist($entity);
         $this->addReference('programYearStewards' . $arr['id'], $entity);
     }
     $manager->flush();
 }