tical Container');
    goog.array.forEach(
        ['Athos', 'Porthos', 'Aramis', 'd\'Artagnan'],
        function(item) {
          var c = new goog.ui.Control(item);
          c.setId(item);
          // For demo purposes, have controls dispatch transition events.
          c.setDispatchTransitionEvents(goog.ui.Component.State.ALL, true);
          vc.addChild(c, true);
        });
    vc.addChildAt(new goog.ui.Separator(), 3, true);
    vc.getChild('Porthos').setEnabled(false);
    vc.render(goog.dom.get