@Override
  public Set<ServerConnection> getAllServerConnections() {
    return Collections.unmodifiableSet(allSCs);
  }
This method finds a client notifier and returns it. It is used to propagate interest
registrations to other servers

@return the instance that provides client notification
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/AcceptorImpl.java