public void testGroupTwo() {
final DummyEventStore eventStore = new DummyEventStore();
final GroupEventSink eventSink = new GroupEventSink(3);
eventSink.setFilterTransactionEntry(true);
eventSink.setEventStore(eventStore);
eventSink.start();
ExecutorService executor = Executors.newFixedThreadPool(3);
final CountDownLatch latch = new CountDownLatch(1);
executor.submit(new Runnable() {