*/
  @Test
  fun canceledBeforeIOSignalsOnFailure() {
    // Force requests to be executed serially.
    val dispatcher = Dispatcher(client.dispatcher.executorService)
    dispatcher.maxRequests = 1
    client =
      client.newBuilder()
        .dispatcher(dispatcher)
        .build()
    val requestA = Request(server.url("/a"))
    val requestB = Request(server.url("/b"))

            return response
        ```
        """

        def decorator(func: DecoratedCallable) -> DecoratedCallable:
            self.add_middleware(BaseHTTPMiddleware, dispatch=func)
            return func

        return decorator

    def exception_handler(
        self,
        exc_class_or_status_code: Annotated[
            Union[int, Type[Exception]],