source.getNode("A").addAttribute("A1", "foo");
source.getNode("A").addAttribute("A2", "foo");
ThreadProxyPipe proxy = new ThreadProxyPipe();
proxy.addSink(target);
proxy.init(source, true);
Thread other = new Thread(new AnotherThread(proxy, target) {
public void run() {
// The second part of the test starts