code: public function folderSearch(FolderSearch $search)
      {
          $parameters = [
              'query' => [],
              'body' => json_encode(['search' => $search], JSON_UNESCAPED_UNICODE),
              'headers' => [],
          ];
  
          $result = $this->post('v1/search/folder', $parameters);
          $result = new SearchResult($result);
  
          return $result;
      }
docs: Search for Folder.
  
  s in QBank
  
  @param  FolderSearch $search Search parameters
  @return SearchResult