@Override
      public void run2() throws CacheException {
        Region region = basicGetCache().getRegion(SEPARATOR + regionName);
        assertNotNull(region);
        region.destroy(key);
        basicGetCache().getLogger().info("done destroy successfully");

      }
In this test do a create , update , update & destroy. The client should receive 3 callbacks (
craete , conflated update & destroy).
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ha/HAConflationDistributedTest.java