loadByStream example

#[Route(path: '/store-api/product/{productId}/cross-selling', name: 'store-api.product.cross-selling', methods: ['POST'], defaults: ['_entity' => 'product'])]     public function load(string $productId, Request $request, SalesChannelContext $context, Criteria $criteria): ProductCrossSellingRouteResponse
    {
        $crossSellings = $this->loadCrossSellings($productId, $context);

        $elements = new CrossSellingElementCollection();

        foreach ($crossSellings as $crossSelling) {
            $clone = clone $criteria;
            if ($this->useProductStream($crossSelling)) {
                $element = $this->loadByStream($crossSelling, $context, $clone);
            } else {
                $element = $this->loadByIds($crossSelling, $context, $clone);
            }

            $elements->add($element);
        }

        $this->eventDispatcher->dispatch(new ProductCrossSellingsLoadedEvent($elements, $context));

        return new ProductCrossSellingRouteResponse($elements);
    }