code: def get_consistent_resource(self):
          
          http_client = HttpClient()
          response, _ = http_client.get(
              routes.url(routes.REFUND_RESOURCE, resource_id=self.id, payment_id=self.payment_id)
          )
          return Refund(**response)
docs: :return a refund that you can trust.
          :rtype Refund