+Ext.reg('columntree', Ext.ux.tree.ColumnTree);\r
+\r
+//backwards compat\r
+Ext.tree.ColumnTree = Ext.ux.tree.ColumnTree;\r
+\r
+\r
+/**\r
+ * @class Ext.ux.tree.ColumnNodeUI\r
+ * @extends Ext.tree.TreeNodeUI\r
+ */\r
+Ext.ux.tree.ColumnNodeUI = Ext.extend(Ext.tree.TreeNodeUI, {\r