in themes/kube/static/js/kube.js [1751:1765]
open: function(e, push)
{
if (typeof e === 'undefined') return;
if (typeof e === 'object') e.preventDefault();
var item = (typeof e === 'object') ? this.getItem(e.target) : this.getItemBy(e);
this.closeAll();
this.callback('open', item);
this.addActive(item);
// push state (doesn't need to push at the start)
this.pushStateOpen(push, item);
this.callback('opened', item);
},