public function uninstall()
 {
     $status = true;
     $veritrans_payment_waiting_order_state_id = Configuration::get('VT_ORDER_STATE_ID');
     if ($veritrans_payment_waiting_order_state_id) {
         $order_state = new OrderStateCore($veritrans_payment_waiting_order_state_id);
         $order_state->delete();
     }
     if (!parent::uninstall()) {
         $status = false;
     }
     return $status;
 }