@Override
        public void afterUpdate(EntryEvent<String, Integer> event) {
          Region<String, Integer> region = event.getRegion();
          @SuppressWarnings("unchecked")
          BlockingQueue<Integer> queue = (BlockingQueue<Integer>) region.getUserAttribute();
          int value = event.getNewValue();
          try {
            queue.put(value);
          } catch (InterruptedException e) {
            throw new RuntimeException(e);
          }
        }
Verifies that distributed updates are delivered in order.

<p>
Note that this test does not make sense for regions that are {@link Scope#DISTRIBUTED_NO_ACK}
for which we do not guarantee the ordering of updates for a single producer/single consumer.

@throws Exception if the test fails
geode-dunit/src/main/java/org/apache/geode/cache30/MultiVMRegionTestCase.java