code: def get_assessment_part_items(self, assessment_part_id):
          
          mgr = self._get_provider_manager('ASSESSMENT_AUTHORING', local=True)
          lookup_session = mgr.get_assessment_part_lookup_session(proxy=self._proxy)
          if self._catalog_view == ISOLATED:
              lookup_session.use_isolated_bank_view()
          else:
              lookup_session.use_federated_bank_view()
          item_ids = lookup_session.get_assessment_part(assessment_part_id).get_item_ids()
          mgr = self._get_provider_manager('ASSESSMENT')
          lookup_session = mgr.get_item_lookup_session(proxy=self._proxy)
          lookup_session.use_federated_bank_view()
          return lookup_session.get_items_by_ids(item_ids)
docs: Gets the list of items mapped to the given ``AssessmentPart``.
  
          In plenary mode, the returned list contains all known items or
          an error results. Otherwise, the returned list may contain only
          those items that are accessible through this session.
  
          arg:    assessment_part_id (osid.id.Id): ``Id`` of the
                  ``AssessmentPart``
          return: (osid.assessment.ItemList) - list of items
          raise:  NotFound - ``assessment_part_id`` not found
          raise:  NullArgument - ``assessment_part_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method is must be implemented.*