getNavigation example

$categories = $this->navigationRoute
            ->load($activeId, $rootId, $request, $context, $criteria)
            ->getCategories();

        $navigation = $this->getTree($rootId, $categories, $categories->get($activeId));

        $event = new NavigationLoadedEvent($navigation, $context);

        $this->eventDispatcher->dispatch($event);

        return $event->getNavigation();
    }

    private function getTree(?string $rootId, CategoryCollection $categories, ?CategoryEntity $active): Tree
    {
        $parents = [];
        $items = [];
        foreach ($categories as $category) {
            $item = clone $this->treeItem;
            $item->setCategory($category);

            $parents[$category->getParentId()][$category->getId()] = $item;
            

'id' => $seoCategoryId],
            ],
        ]);

        $this->updateProductStream($product->getId(), Uuid::randomHex());

        $request = new Request([], [], ['productId' => $product->getId()]);

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

        static::assertNotNull($page->getHeader());
        static::assertNotNull($page->getHeader()->getNavigation());
        static::assertNotNull($page->getHeader()->getNavigation()->getActive());
        static::assertEquals($seoCategoryName, $page->getHeader()->getNavigation()->getActive()->getName());
        static::assertEquals($seoCategoryId, $page->getHeader()->getNavigation()->getActive()->getId());
    }

    public function testItDoesLoadACmsProductDetailPage(): void
    {
        $context = $this->createSalesChannelContextWithNavigation();
        $cmsPageId = Uuid::randomHex();
        $productCmsPageData = [
            'cmsPage' => [