/**
  * @Given /^there are the following classrooms:$/
  */
 public function thereAreTheFollowingClassrooms(TableNode $table)
 {
     $em = $this->kernel->getContainer()->get('doctrine')->getManager();
     foreach ($table->getHash() as $hash) {
         $classroom = new Entity\Classroom();
         $classroom->setName($hash['name']);
         $classroom->setTeacher($this->findTeacherEntity($hash['teacher']));
         $em->persist($classroom);
         $em->flush();
     }
 }