setDeepLinkCode example

/** @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
    {
        $criteria = $this->createCriteria($request, $context);
        

throw CartException::customerNotLoggedIn();
        }

        $page = $this->genericLoader->load($request, $salesChannelContext);

        $page = AccountOrderPage::createFrom($page);

        $page->getMetaInformation()?->setRobots('noindex,follow');

        $page->setOrders(StorefrontSearchResult::createFrom($this->getOrders($request, $salesChannelContext)));

        $page->setDeepLinkCode($request->get('deepLinkCode'));

        $firstOrder = $page->getOrders()->getEntities()->first();
        $orderCustomerId = $firstOrder?->getOrderCustomer()?->getCustomer()?->getId();
        if ($request->get('deepLinkCode') && $orderCustomerId !== null) {
            $this->accountService->loginById(
                $orderCustomerId,
                $salesChannelContext
            );
        }

        $this->eventDispatcher->dispatch(