private void putInRegion(VM vm, final Object key, final int value) {
    SerializableCallable createSystem = new SerializableCallable() {
      @Override
      public Object call() throws Exception {
        Cache cache = getCache();
        Region region1 = cache.getRegion("region");
        region1.put(key, new SimpleClass(value, (byte) value));
        return null;
      }
    };
    vm.invoke(createSystem);
  }
Test that an async queue doesn't require a persistent PDX type registry.
geode-core/src/distributedTest/java/org/apache/geode/pdx/PDXAsyncEventQueueDUnitTest.java