docs: def _get_assessment_taken(self, assessment_taken_id):
          """Helper method for getting an AssessmentTaken objects given an Id."""
          if assessment_taken_id not in self._assessments_taken:
              mgr = self._get_provider_manager('ASSESSMENT')
              lookup_session = mgr.get_assessment_taken_lookup_session(proxy=self._proxy)  # Should this be _for_bank?
              lookup_session.use_federated_bank_view()
              self._assessments_taken[assessment_taken_id] = (
                  lookup_session.get_assessment_taken(assessment_taken_id))
          return self._assessments_taken[assessment_taken_id]