docs: def get_assessment_parts_by_banks(self, bank_ids):
          """Gets the list of assessment part corresponding to a list of ``Banks``.
  
          arg:    bank_ids (osid.id.IdList): list of bank ``Ids``
          return: (osid.assessment.authoring.AssessmentPartList) - list of
                  assessment parts
          raise:  NullArgument - ``bank_ids`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for
          # osid.resource.ResourceBinSession.get_resources_by_bins
          assessment_part_list = []
          for bank_id in bank_ids:
              assessment_part_list += list(
                  self.get_assessment_parts_by_bank(bank_id))
          return objects.AssessmentPartList(assessment_part_list)