ProductSearchResultEvent example

$this->eventDispatcher->dispatch(
            new ProductSearchCriteriaEvent($request, $criteria, $context),
            ProductEvents::PRODUCT_SEARCH_CRITERIA
        );

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

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

        $this->eventDispatcher->dispatch(
            new ProductSearchResultEvent($request, $response->getListingResult(), $context),
            ProductEvents::PRODUCT_SEARCH_RESULT
        );

        $response->getListingResult()->addCurrentFilter('search', $request->get('search'));

        return $response;
    }
}