docs: def _response_item_to_object(self, resp_item):
          """
          take json and make a resource out of it
          """
          item_cls = resources.get_model_class(self.resource_type)
          properties_dict = resp_item[self.resource_type]
          new_dict = helpers.remove_properties_containing_None(properties_dict)
          # raises exception if something goes wrong
          obj = item_cls(new_dict)
          return obj