public static boolean singletonHasClientProxies() {
    CacheClientNotifier instance = ccnSingleton;
    if (instance != null) {
      return instance.hasClientProxies();
    }
    return false;
  }
notify interested clients of the given cache event. 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