code: function(node, success, error, timeout) {
          //ask for all items
          var iq = $iq({from:this.jid, to:this.service, type:'get'})
            .c('pubsub', { xmlns:Strophe.NS.PUBSUB })
            .c('items', {node:node});
  
          return this._connection.sendIQ(iq.tree(), success, error, timeout);
      }
docs: /*Function: items
  Used to retrieve the persistent items from the pubsub node.