return StreamResponse.asEmptyBody(); // no-op
    }

    private StreamResponse writeNdjsonResponse(final String id, final Consumer<Writer> writeCall) {
        return asStream(id)//
                .header("Pragma", "no-cache")//
                .header("Cache-Control", "no-cache")//
                .header("Expires", "Thu, 01 Dec 1994 16:00:00 GMT")//