Eccube\Application::getInstance PHP Method

    public static function getInstance(array $values = array())
    {
        if (!is_object(self::$instance)) {
            self::$instance = new Application($values);
        }
        return self::$instance;
    }

 /**
  * @param Schema $schema
  */
 public function down(Schema $schema)
 {
     $app = \Eccube\Application::getInstance();
     $em = $app['orm.em'];
     $this->delete_dtb_csv($em);
     $em->flush();
 }