public function addPrevPage(Result $result): ? string
    {
        $query = $result->getQuery();
        $urlParameters = $this->generateQueryUrlParameters($result);
        $page = $query->getPage();
        $prevPage = $page - 1;

        if ($prevPage < 1) {
            return null;
        }

        $urlParameters['page'] = $prevPage;

        return $this->createUrlByUrlParameters(
            $result,
            $urlParameters
        )['route'];
    }