@Override
  public void handleCacheClose(Operation operation) {
    try {
      super.handleCacheClose(operation);
    } finally {
      distributedRegionCleanup(null);
    }
  }
Free resources held by this region. This method is invoked after isDestroyed has been set to
true.
geode-core/src/main/java/org/apache/geode/internal/cache/DistributedRegion.java