async::spawn(
            ViewListenerRequestStream::from_channel(listener_server)
                .for_each(move |req| {
                    let ViewListenerRequest::OnPropertiesChanged { properties, .. } = req;
                    view_ptr
                        .lock()
                        .unwrap()
                        .handle_properies_changed(&properties);
                    futures::future::ok(())
                })
                .map(|_| ())
                .recover(|e| eprintln!("view listener error: {:?}", e)),
        )