docs: def get_next_assessment_part_id(self, assessment_part_id):
          """This supports the basic simple sequence case. Can be overriden in a record for other cases"""
          if self.has_next_assessment_part(assessment_part_id):
              return Id(self._my_map['childIds'][self._my_map['childIds'].index(str(assessment_part_id)) + 1])