/*jshint expr:true, onevar:false */
                            
                            /**
                            Extension for `Tree` that adds baked-in support for node labels like you might
                            see in a treeview or menu.
                            
                            @module tree
                            @submodule tree-labelable
                            @main tree-labelable
                            **/
                            
                            /**
                            Extension for `Tree` that adds baked-in support for node labels like you might
                            see in a treeview or menu.
                            
                            @class Tree.Labelable
                            @constructor
                            @extensionfor Tree
                            **/
                            
                            function Labelable() {}
                            
                            Labelable.prototype = {
                                initializer: function () {
                                    this.nodeExtensions = this.nodeExtensions.concat(Y.Tree.Node.Labelable);
                                }
                            };
                            
                            Y.Tree.Labelable = Labelable;