Expanding all nodes in dijit.Tree

Is there a good way to expand/close all the expandable nodes in a `dijit.Tree`? For those looking for an answer, put this in your initializing code: ``` var treeControl = new dijit.Tree({ model: treeModel, expandAll: function() { // summary: // Expand all nodes in the tree // returns: // Deferred that fires when all nodes have expanded var _this = this; function expand(node) { _this._expandNode(node); var childBranches = dojo.filter(node.getChildren() || [], function(node) { return node.isExpandable; }); var def = new dojo.Deferred(); defs = dojo.map(childBranches, expand); } return expand(this.rootNode); } }); ``` At least, that works for me. And you can do the same with `collapseAll()` where you only need to switch `_this._expandNode(node);` with `_this._collapseNode(node);`