'Retrieve the content of an individual item.'

def get_item(self, jid, node, item_id, ifrom=None, block=True, callback=None, timeout=None):

    iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
    item = stanza.Item()
    item['id'] = item_id
    iq['pubsub']['items']['node'] = node
    iq['pubsub']['items'].append(item)
    return iq.send(block=block, callback=callback, timeout=timeout)
