isPaymentChangeable example

try {
            $page = $this->accountEditOrderPageLoader->load($request, $context);
        } catch (OrderException $exception) {
            $this->addFlash(self::DANGER, $this->trans('error.' . $exception->getErrorCode(), ['%orderNumber%' => $order->getOrderNumber()]));

            return $this->redirectToRoute('frontend.account.order.page');
        }

        $this->hook(new AccountEditOrderPageLoadedHook($page, $context));

        if ($page->isPaymentChangeable() === false) {
            $refundsEnabled = $this->systemConfigService->get('core.cart.enableOrderRefunds');

            if ($refundsEnabled) {
                $this->addFlash(self::DANGER, $this->trans('account.editOrderPaymentNotChangeableWithRefunds'));
            } else {
                $this->addFlash(self::DANGER, $this->trans('account.editOrderPaymentNotChangeable'));
            }
        }

        $page->setErrorCode($request->get('error-code'));

        

static::assertSame($context->getCustomer()->getDefaultPaymentMethodId(), $paymentMethods[1]->getId());
    }

    public function testShouldNotAllowPaymentMethodChangeOnCertainTransactionStates(): void
    {
        $request = new Request();
        $context = $this->createSalesChannelContextWithLoggedInCustomerAndWithNavigation();
        $orderId = $this->placeRandomOrder($context);

        $page = $this->getPageLoader()->load($request, $context);

        static::assertTrue($page->isPaymentChangeable());

        $this->setOrderToTransactionState(
            $orderId,
            $context,
            StateMachineTransitionActions::ACTION_AUTHORIZE
        );

        $page = $this->getPageLoader()->load($request, $context);

        static::assertFalse($page->isPaymentChangeable());
    }

    

$orderRouteResponse = $this->getOrder($request, $salesChannelContext);

        /** @var OrderEntity $order */
        $order = $orderRouteResponse->getOrders()->first();

        if ($this->isOrderPaid($order)) {
            throw OrderException::orderAlreadyPaid($order->getId());
        }

        $page->setOrder($order);
        $page->setPaymentChangeable($this->isPaymentChangeable($orderRouteResponse, $page));
        $page->setPaymentMethods($this->getPaymentMethods($salesChannelContext, $request, $order));
        $page->setDeepLinkCode($request->get('deepLinkCode'));

        $this->eventDispatcher->dispatch(
            new AccountEditOrderPageLoadedEvent($page, $salesChannelContext, $request)
        );

        return $page;
    }

    private function getOrder(Request $request, SalesChannelContext $context): OrderRouteResponse
    {