code: public function getAssessmentItemRefByIdentifiers(\tao_models_classes_service_StorageDirectory $privateCompilationDirectory, array $identifiers)
      {
          $assessmentItemRefs = [];
          
          foreach ($identifiers as $identifier) {
              $assessmentItemRefs[] = $this->getAssessmentItemRefByIdentifier($privateCompilationDirectory, $identifier);
          }
          
          return $assessmentItemRefs;
      }
docs: Get AssessmentItemRef by Identifiers
  
  This method enables you to access to a collection of pre-compiled versions of stand alone AssessmentItemRef objects, that can be run
  with stand alone AssessmentItemSessions.
  
  @return array An array of AssessmentItemRef objects.