code: function(ctx, flag, opts) {
  		var tree = ctx.tree,
  			node = ctx.node;
  // Let the base implementation expand/collapse the node, then redraw the title
  // after the animation has finished
  		return this._super(ctx, flag, opts).always(function(){
  			tree.nodeRenderTitle(ctx);
  		});
  	}
docs: Overload the `setExpanded` hook, so the counters are updated