"""
    app = FastAPI()

    def default_response() -> Response:
        response = JSONResponse(content={"status": "ok"})
        response.headers["X-Custom"] = "initial"
        return response

    @app.get("/")
    def endpoint(response: Annotated[Response, Depends(default_response)]):
        response.headers["X-Custom"] = "modified"
        return response