code: @Test public void statelessTest() throws ExecutionException, InterruptedException {
    OrbitStage stage1=createStage();
    OrbitStage stage2=createStage();
    OrbitStage stage3=createStage();
    OrbitStage stage4=createStage();
    OrbitStage client=createClient();
    IStatelessThing actor1=stage1.getReference(IStatelessThing.class,"1000");
    IStatelessThing actor2=stage2.getReference(IStatelessThing.class,"1000");
    IStatelessThing actor3=stage3.getReference(IStatelessThing.class,"1000");
    IStatelessThing actor4=stage4.getReference(IStatelessThing.class,"1000");
    IStatelessThing actor5=client.getReference(IStatelessThing.class,"1000");
    final Set<UUID> set=new HashSet<>();
    for (int i=0; i < 25; i++) {
      set.add(actor1.getUniqueActivationId().join());
      set.add(actor2.getUniqueActivationId().join());
      set.add(actor3.getUniqueActivationId().join());
      set.add(actor4.getUniqueActivationId().join());
      set.add(actor5.getUniqueActivationId().join());
    }
    assertEquals(4,set.size());
    set.clear();
    List<Future<UUID>> futures=new ArrayList<>();
    for (int i=0; i < 50; i++) {
      futures.add(actor1.getUniqueActivationId(5000));
      futures.add(actor2.getUniqueActivationId(5000));
      futures.add(actor3.getUniqueActivationId(5000));
      futures.add(actor4.getUniqueActivationId(5000));
      futures.add(actor5.getUniqueActivationId(5000));
    }
    futures.forEach(f -> {
      try {
        set.add(f.get(10,TimeUnit.SECONDS));
      }
   catch (    Exception e) {
        throw new UncheckedException(e);
      }
    }
  );
    final int size=set.size();
    assertTrue("Expecting >4 but was: " + size,size > 4);
    assertTrue("Expecting <=" + (50 * 5) + " but was: "+ size,size <= 50 * 5);
  }
  