public function getRatingData()
 {
     require_once ROOT_DIR . '/services/API/WorkAPI.php';
     $workAPI = new WorkAPI();
     $groupedWorkId = $this->getGroupedWorkId();
     if ($groupedWorkId == null) {
         return null;
     } else {
         return $workAPI->getRatingData($this->getGroupedWorkId());
     }
 }
 public function getRatingData()
 {
     require_once ROOT_DIR . '/services/API/WorkAPI.php';
     $workAPI = new WorkAPI();
     return $workAPI->getRatingData($this->getPermanentId());
 }