public static Map getStatusForAllClientsIgnoreSubscriptionStatus() {
    Map result = new HashMap();
    if (ClientHealthMonitor.getInstance() != null) {
      result = ClientHealthMonitor.getInstance().getStatusForAllClients();
    }

    return result;
  }
This method returns the CacheClientStatus for all the clients that are connected to this
server. This method returns all clients irrespective of whether subscription is enabled or not.

@return Map of ClientProxyMembershipID against CacheClientStatus objects.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/InternalClientMembership.java