public function load(ObjectManager $manager)
 {
     $languages = array("English", "Spanish", "Romanian");
     $levels = array("A1", "A2", "B1", "B2", "C1", "C2");
     // Create each language with all levels
     foreach ($languages as $language) {
         foreach ($levels as $level) {
             $entity = new Language();
             $entity->setLanguage($language);
             $entity->setLevel($level);
             $manager->persist($entity);
         }
     }
     $manager->flush();
 }