public String getLocalAddr() {
        InetSocketAddress localAddress = localAddress();
        if (localAddress.getAddress() == null) return null;
        return localAddress.getAddress().getHostAddress();
    }
@Test
    void requireThatUnresolvableRemoteAddressesAreSupported() {
        URI uri = URI.create("http://doesnotresolve.zzz:8080/test");
        HttpRequest httpReq = newRequest(uri, HttpRequest.Method.GET, HttpRequest.Version.HTTP_1_1);
        DiscFilterRequest request = new DiscFilterRequest(httpReq);
        assertNull(request.getLocalAddr());
    }