code: public function hasFeedbacks(RunnerServiceContext $context, $itemRef)
      {
          $hasFeedbacks     = false;
          $displayFeedbacks = $this->displayFeedbacks($context);
          if($displayFeedbacks) {
              $feedbacks = $this->getFeedbacks($context, $itemRef);
              foreach ($feedbacks as $entry) {
                  if(isset($entry['feedbackRules'])){
                      if(count($entry['feedbackRules']) > 0){
                          $hasFeedbacks = true;
                      }
                      break;
                  }
              }
          }
          return $hasFeedbacks;
      }
docs: Does the given item has feedbacks
  
  @param RunnerServiceContext $context
  @param string $itemRef  the item reference
  @return boolean
  @throws \common_Exception
  @throws \common_exception_InconsistentData
  @throws \common_exception_InvalidArgumentType
  @throws \tao_models_classes_FileNotFoundException