setListing example

        $navigationId = $this->getNavigationId($request, $context);

        $criteria = new Criteria();
        $criteria->setTitle('cms::product-listing');

        $listing = $this->listingRoute
            ->load($navigationId, $request, $context, $criteria)
            ->getResult();

        $data->setListing($listing);
    }

    private function getNavigationId(Request $request, SalesChannelContext $salesChannelContext): string
    {
        if ($navigationId = $request->get('navigationId')) {
            return $navigationId;
        }

        $params = $request->attributes->get('_route_params');

        if ($params && isset($params['navigationId'])) {
            

if (!$request->query->has('search')) {
            throw RoutingException::missingRequestParameter('search');
        }

        $criteria = new Criteria();
        $criteria->setTitle('search-page');

        $result = $this->productSearchRoute
            ->load($request, $salesChannelContext, $criteria)
            ->getListingResult();

        $page->setListing($result);

        $page->setSearchTerm(
            (string) $request->query->get('search')
        );

        $this->eventDispatcher->dispatch(
            new SearchPageLoadedEvent($page, $salesChannelContext, $request)
        );

        return $page;
    }
}