String iqStanzaID = stanza.getAttributeValue("id");
StanzaBuilder sb = StanzaBuilder.createIQStanza(serverJID, sender, IQStanzaType.RESULT, iqStanzaID);
sb.startInnerElement("pubsub", NamespaceURIs.XEP0060_PUBSUB_OWNER);
String nodeName = extractNodeName(stanza);
LeafNode node = root.find(nodeName);
if(node == null) {
return errorStanzaGenerator.generateNoNodeErrorStanza(sender, serverJID, stanza);
}