code: protected function getUrlsByDocumentParameter()
      {
          if (count($this->documentParamCache) < 1) {
              return [];
          }
  
          $urls = [];
          $query = new Query();
          $queryTerms = [];
  
          foreach ($this->documentParamCache as $param) {
              $queryTerms[$param[0]][] = $param[1];
          }
  
          foreach ($queryTerms as $field => $values) {
              $termQuery = new TermQuery($field, $values);
              $query->addQuery($termQuery, 'should');
          }
  
          $limitFilter = new LimitFilter(count($this->documentParamCache));
          $repository = $this->manager->getRepository('MultiModel');
          $search = $repository->createSearch()->addQuery($query)
              ->addFilter($limitFilter);
          $documents = $repository->execute($search);
  
          // Add all category urls to invalidate.
          foreach ($documents as $document) {
              if (is_array($document->url)) {
                  foreach ($document->url as $url) {
                      $urls[] = $url['url'];
                  }
              }
          }
  
          array_walk($urls, [$this, 'addWildcard']);
          $this->addUrls($urls);
  
          return $urls;
      }
docs: Returns array of links got by document id.
  
  @return array