Sulu\Component\Rest\ListBuilder\ListRestHelper::getPage PHP Method

    public function getPage()
    {
        return $this->getRequest()->get('page', 1);
    }

 /**
  * Perform a search and return a JSON response.
  *
  * @param Request $request
  *
  * @return JsonResponse
  */
 public function searchAction(Request $request)
 {
     $queryString = $request->query->get('q');
     $category = $request->query->get('category', null);
     $locale = $request->query->get('locale', null);
     $page = $this->listRestHelper->getPage();
     $limit = $this->listRestHelper->getLimit();
     $aggregateHits = [];
     $startTime = microtime(true);
     $categories = $category ? [$category] : $this->searchManager->getCategoryNames();
     foreach ($categories as $category) {
         $query = $this->searchManager->createSearch($queryString);
         if ($locale) {
             $query->locale($locale);
         }
         if ($category) {
             $query->category($category);
         }
         foreach ($query->execute() as $hit) {
             $aggregateHits[] = $hit;
         }
     }
     $time = microtime(true) - $startTime;
     $adapter = new ArrayAdapter($aggregateHits);
     $pager = new Pagerfanta($adapter);
     $pager->setMaxPerPage($limit);
     $pager->setCurrentPage($page);
     $representation = new SearchResultRepresentation(new CollectionRepresentation($pager->getCurrentPageResults(), 'result'), 'sulu_search_search', ['locale' => $locale, 'query' => $query, 'category' => $category], (int) $page, (int) $limit, $pager->getNbPages(), 'page', 'limit', false, count($aggregateHits), $this->getCategoryTotals($aggregateHits), number_format($time, 8));
     $view = View::create($representation);
     $context = SerializationContext::create();
     $context->enableMaxDepthChecks();
     $context->setSerializeNull(true);
     $view->setSerializationContext($context);
     return $this->viewHandler->handle($view);
 }