code: public void sendTo(String topicURI, Object event, String eligibleWebSocketSessionId) {
  		sendTo(topicURI, event, Collections.singleton(eligibleWebSocketSessionId));
  	}
docs: Send an {@link EventMessage} to one client that is subscribed to the given
  topicURI. If the client with the given WebSocket session id is not subscribed to
  the topicURI nothing happens.
  
  @param topicURI the name of the topic
  @param event the payload of the {@link EventMessage}
  @param eligibleWebSocketSessionId only the client with the WebSocket session id
  listed here will receive the EVENT message