code: public void publish() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
          PubSub packet = createPubsubPacket(Type.set, new NodeExtension(PubSubElementType.PUBLISH, getId()));
  
          pubSubManager.getConnection().createStanzaCollectorAndSend(packet).nextResultOrThrow();
      }
docs: Publishes an event to the node.  This is an empty event
  with no item.
  
  This is only acceptable for nodes with {@link ConfigureForm#isPersistItems()}=false
  and {@link ConfigureForm#isDeliverPayloads()}=false.
  
  @throws XMPPErrorException
  @throws NoResponseException
  @throws NotConnectedException
  @throws InterruptedException