* A TreeLoader provides for lazy loading of an {@link Roo.tree.TreeNode}'s child
* nodes from a specified URL. The response must be a javascript Array definition
* who's elements are node definition objects. eg:
+ *
+ * new Roo.tree.Loader( {root : 'data' });
+ * is best practice now, the old expect array is still supported by default, but
+ * not recomended.
+ *
* <pre><code>
- [{ 'id': 1, 'text': 'A folder Node', 'leaf': false },
- { 'id': 2, 'text': 'A leaf Node', 'leaf': true }]
+ *
+ * {
+ * success : true,
+ * {ROOTNAME} : [
+ * { 'id': 1, 'text': 'A folder Node', 'leaf': false },
+ { 'id': 2, 'text': 'A leaf Node', 'leaf': true }
+ ]
</code></pre>
* <br><br>
* A server request is sent, and child nodes are loaded only when a node is expanded.