* @param child the deleted node that was removed from this node.
*/
void childNodeDeleted(Node child) {
// Build packet to broadcast to subscribers
Message message = new Message();
Element event = message.addChildElement("event", "http://jabber.org/protocol/pubsub#event");
event.addElement("delete").addAttribute("node", child.getNodeID());
// Broadcast event notification to subscribers
broadcastCollectionNodeEvent(child, message);
}