public function updateBank()
 {
     //        $bank = new Bank($this->registry);
     if (isset($_POST['submit'])) {
         if ($_POST['nama'] == "") {
             echo 'nama bank tidak boleh kosong';
         } else {
             $bank = new Bank($registry);
             $bank->set_id($_POST['id']);
             $bank->set_nama($_POST['nama']);
             $bank->set_keterangan($_POST['keterangan']);
             $bank->updateBank($bank);
         }
     }
     header('location:' . URL . 'admin/list_bank');
 }