@Override
        public void run2() throws CacheException {
          DistributedCacheOperation.SLOW_DISTRIBUTION_MS = 0;
        }
Test creates two sites and one Replicated Region on each with Serial GatewaySender on each.
Test checks for sequence of events being sent from site1 to site2 for PUTALL and PUT and
finally checks for final timestamp in version for RegionEntry with key "testKey". If timestamp
on both site is same that means events were transferred in correct sequence.
geode-wan/src/distributedTest/java/org/apache/geode/internal/cache/wan/misc/NewWANConcurrencyCheckForDestroyDUnitTest.java