code: public void send(EventMessage eventMessage) {
  		long timeout = this.sendTimeout;
  		boolean sent = timeout >= 0 ? this.brokerChannel.send(eventMessage, timeout)
  				: this.brokerChannel.send(eventMessage);
  
  		if (!sent) {
  			throw new MessageDeliveryException(eventMessage,
  					"Failed to send message with destination '"
  							+ eventMessage.getDestination() + "' within timeout: "
  							+ timeout);
  		}
  	}
docs: Send an EventMessage to the {@link SimpleBrokerMessageHandler}. The broker looks up
  if the receiver of the message ({@link EventMessage#getWebSocketSessionId()}) is
  subscribed to the destination ({@link EventMessage#getDestination()}). If the
  receiver is subscribed the broker sends the message to him.
  
  @param eventMessage The event message