@router.get("/a", responses={501: {"description": "Error 1"}})
async def a():
    return "a"


@router.get(
    "/b",
    responses={
        502: {"description": "Error 2"},
        "4XX": {"description": "Error with range, upper"},
    },
)
async def b():
    return "b"


@router.get(
    "/c",
    responses={
        "400": {"description": "Error with str"},
        "5xx": {"description": "Error with range, lower"},

                    process_response = additional_response.copy()
                    process_response.pop("model", None)
                    status_code_key = str(additional_status_code).upper()
                    if status_code_key == "DEFAULT":
                        status_code_key = "default"
                    openapi_response = operation_responses.setdefault(
                        status_code_key, {}

        self.path_regex, self.path_format, self.param_convertors = compile_path(path)
        if methods is None:
            methods = ["GET"]
        self.methods: Set[str] = {method.upper() for method in methods}
        if isinstance(generate_unique_id_function, DefaultPlaceholder):
            current_generate_unique_id: Callable[
                ["APIRoute"], str