ProductReviewsLoadedEvent example

throw RoutingException::missingRequestParameter('productId');
        }

        $criteria = $this->createCriteria($request, $context);

        $reviews = $this->route
            ->load($productId, $request, $context, $criteria)
            ->getResult();

        $reviews = StorefrontSearchResult::createFrom($reviews);

        $this->eventDispatcher->dispatch(new ProductReviewsLoadedEvent($reviews, $context, $request));

        $reviewResult = ReviewLoaderResult::createFrom($reviews);
        $reviewResult->setProductId($request->get('productId'));
        $reviewResult->setParentId($request->get('parentId'));

        $aggregation = $reviews->getAggregations()->get('ratingMatrix');
        $matrix = new RatingMatrix([]);

        if ($aggregation instanceof TermsResult) {
            $matrix = new RatingMatrix($aggregation->getBuckets());
        }