code: def get_child_models(self):
          
          child_models = []
          # Loop through all models with FKs back to `base_model`.
          for related_object in get_all_related_objects(self.base_model._meta):
              # Django 1.8 deprecated `get_all_related_objects()`. We're still
              # using it for now with the documented work-around for
              # compatibility with Django <=1.7.
              model = getattr(
                  related_object, 'related_model', related_object.model)
              # Only consider `base_model` subclasses.
              if issubclass(model, self.base_model):
                  class SettingValueAdmin(self.base_admin_class):
                      pass
                  child_models.append((model, SettingValueAdmin))
          return child_models
docs: Returns a list of ``(Model, ModelAdmin)`` tuples for ``base_model``
          subclasses.