Doctrine\ORM\Tools\SchemaTool::__construct PHP Method

    public function __construct(EntityManager $em)
    {
        $this->_em = $em;
        $this->_platform = $em->getConnection()->getDatabasePlatform();
    }

 /**
  * {@inheritdoc}
  */
 public function __construct(EntityManagerInterface $em)
 {
     $this->em = $em;
     $this->platform = $this->getConnection()->getDatabasePlatform();
     parent::__construct($em);
 }