code: public void sendToAllExcept(String topicURI, Object event,
  			String excludeWebSocketSessionId) {
  		sendToAllExcept(topicURI, event,
  				Collections.singleton(excludeWebSocketSessionId));
  	}
docs: Send an {@link EventMessage} to every client that is currently subscribed to the
  provided topicURI except the one provided with the excludeSessionId parameter.
  
  @param topicURI the name of the topic
  @param event the payload of the {@link EventMessage}
  @param excludeWebSocketSessionId a WebSocket session id that will be excluded