@Override
  public void cleanupForClient(CacheClientNotifier clientNotifier, ClientProxyMembershipID client) {
    if (cache.isClosed() || isDestroyed) {
      return;
    }

    filterProfile.cleanupForClient(clientNotifier, client);

    for (Object regionObject : new SubregionsSet(false)) {
      LocalRegion region = (LocalRegion) regionObject;
      region.cleanupForClient(clientNotifier, client);
    }
  }
Called by ccn when a client goes away

@since GemFire 5.7
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java