ProductListingResultEvent example

$this->eventDispatcher->dispatch(
            new ProductListingCriteriaEvent($request, $criteria, $context)
        );

        $response = $this->getDecorated()->load($categoryId, $request, $context, $criteria);

        $response->getResult()->addCurrentFilter('navigationId', $categoryId);

        $this->processor->process($request, $response->getResult(), $context);

        $this->eventDispatcher->dispatch(
            new ProductListingResultEvent($request, $response->getResult(), $context)
        );

        $response->getResult()->getAvailableSortings()->removeByKey(
            ResolvedCriteriaProductSearchRoute::DEFAULT_SEARCH_SORT
        );

        return $response;
    }
}