code: function() {
        var t = this;
        for (var i in t.tv.orderedNodes) {
          var node = t.tv.orderedNodes[i];
          if (node.type === 'leaf') {
            var tour = node.node;
            t.showTour('/' + tour.get('id'));
            break;
          }
        }
      }
docs: Show the first tour in the tree