str,
            Doc(
                """
                A path prefix handled by a proxy that is not seen by the application
                but is seen by external clients, which affects things like Swagger UI.

                Read more about it at the
                [FastAPI docs for Behind a Proxy](https://fastapi.tiangolo.com/advanced/behind-a-proxy/).

                **Example**

                        if raw_response.background is None:
                            raw_response.background = background_tasks
                        response = raw_response
                    else:
                        response_args: Dict[str, Any] = {"background": background_tasks}
                        # If status_code was set, use it, otherwise use the default from the