SwitchBuyBoxVariantEvent example

$newProductId = $variantResponse->getFoundCombination()->getVariantId();

        $result = $this->productRoute->load($newProductId, $request, $context, new Criteria());
        $product = $result->getProduct();
        $configurator = $result->getConfigurator();

        $request->request->set('parentId', $product->getParentId());
        $request->request->set('productId', $product->getId());
        $reviews = $this->productReviewLoader->load($request, $context);
        $reviews->setParentId($product->getParentId() ?? $product->getId());

        $event = new SwitchBuyBoxVariantEvent($elementId, $product, $configurator, $request, $context);
        $this->eventDispatcher->dispatch($event);

        $response = $this->renderStorefront('@Storefront/storefront/component/buy-widget/buy-widget.html.twig', [
            'product' => $product,
            'configuratorSettings' => $configurator,
            'totalReviews' => $reviews->getTotalReviews(),
            'elementId' => $elementId,
        ]);
        $response->headers->set('x-robots-tag', 'noindex');

        return $response;
    }