OrderActionsForm::docancel PHP Method

    public function docancel($data, $form)
    {
        if (self::config()->allow_cancelling && $this->order->canCancel()) {
            $this->order->Status = 'MemberCancelled';
            $this->order->write();
            if (self::config()->email_notification) {
                OrderEmailNotifier::create($this->order)->sendCancelNotification();
            }
            $this->controller->sessionMessage(_t("OrderForm.OrderCancelled", "Order sucessfully cancelled"), 'warning');
            if (Member::currentUser() && ($link = $this->order->Link())) {
                $this->controller->redirect($link);
            } else {
                $this->controller->redirectBack();
            }
        }
    }