public function load(ObjectManager $manager)
 {
     $comment1 = new Comment();
     $comment1->setTitle('Sample Comment 1');
     $comment1->setUsername('blogger1');
     $comment1->setComment('To make a long story short. You can\'t go wrong by choosing Symfony! And no one has ever been fired for using Symfony.');
     $comment1->setApproved(true);
     $comment1->setCreated(new \DateTime());
     $comment1->setCommentType('Blog');
     $comment1->setBlogPost($manager->merge($this->getReference('blog1')));
     $manager->persist($comment1);
     $comment2 = new Comment();
     $comment2->setTitle('Sample Comment 2');
     $comment2->setUsername('blogger2');
     $comment2->setComment('To make a long story short. You can\'t go wrong by choosing Symfony! And no one has ever been fired for using Symfony 2.');
     $comment2->setApproved(true);
     $comment2->setCreated(new \DateTime());
     $comment2->setCommentType('Blog');
     $comment2->setBlogPost($manager->merge($this->getReference('blog1')));
     $manager->persist($comment2);
     $comment3 = new Comment();
     $comment3->setTitle('Sample Comment 3');
     $comment3->setUsername('blogger3');
     $comment3->setComment('To make a long story short. You can\'t go wrong by choosing Symfony! And no one has ever been fired for using Symfony 3.');
     $comment3->setApproved(true);
     $comment3->setCreated(new \DateTime());
     $comment3->setCommentType('Blog');
     $comment3->setBlogPost($manager->merge($this->getReference('blog1')));
     $manager->persist($comment3);
     $manager->flush();
 }