docs: def add_choice_id(self, choice_id, inline_region):
          """stub"""
          if inline_region in self.my_osid_object_form._my_map['inlineRegions']:
              self.my_osid_object_form._my_map['inlineRegions'][inline_region]['choiceIds'].append(choice_id)
          else:
              raise IllegalState('that inline region is invalid')