public static void notifyClients(InternalCacheEvent event, ClientUpdateMessage cmsg) {
    CacheClientNotifier instance = ccnSingleton;
    if (instance != null) {
      instance.singletonNotifyClients(event, cmsg);
    }
  }
notify interested clients of the given cache event using the given update message. The event
should have routing information in it that determines which clients will receive the event.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/CacheClientNotifier.java