@Override
      public void afterReceivingFromServer(EventID eventID) {
        System.out.println("Observer2 received " + eventID + "; my eventID is " + eventId);
        testEventIDResult = eventID.equals(eventId);
      }
sets the EventId value in the VM
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/InstantiatorPropagationDUnitTest.java