fetchStreamListing example

        $categoryId = (int) $this->Request()->getParam('sCategory');

        $context = $this->container->get(ContextServiceInterface::class)->getShopContext();

        $category = $this->container->get(CategoryGateway::class)->get($categoryId, $context);
        if ($category instanceof Category) {
            $productStream = $category->getProductStream();

            if ($productStream) {
                $result = $this->fetchStreamListing($categoryId, $productStream->getId());
                $this->setSearchResultResponse($result);

                return;
            }
        }

        $result = $this->fetchCategoryListing();
        $this->setSearchResultResponse($result);
    }

    /** * @return void */