proc doNothingClosureMiddleware(): HandlerAsync {....raises: [], tags: [],
    forbids: [].}

proc extendContextMiddleWare[T: SubContext](ctxType: typedesc[T]): HandlerAsync {.
    ...deprecated.}

proc switch(ctx: Context): owned(Future[void]) {....stackTrace: false,
    raises: [Exception], tags: [RootEffect], forbids: [].}