public PublishedItem getLastPublishedItem() {
        return null;
    }
Returns the last {@link PublishedItem} that was published to the node or {@code null} if
the node does not have published items. Collection nodes does not support publishing
of items so a {@code null} will be returned in that case.

@return the PublishedItem that was published to the node or {@code null} if
        the node does not have published items.
xmppserver/src/main/java/org/jivesoftware/openfire/pubsub/Node.java