/**
  * Extended page UID fetch
  *
  * Uses a range of additional page UID resolve methods to
  * find the currently active page UID from URL, active
  * record, etc.
  *
  * @return integer
  */
 public function getCurrentPageId()
 {
     if (TRUE === $this->concreteConfigurationManager instanceof BackendConfigurationManager) {
         return $this->concreteConfigurationManager->getCurrentPageId();
     }
     return 0;
 }