/**
                                 * Plugin for sortable to handle scrolling lists.
                                 * @module sortable
                                 * @submodule sortable-scroll
                                 */
                                /**
                                 * Plugin for sortable to handle scrolling lists.
                                 * @class SortScroll
                                 * @extends Base
                                 * @constructor
                                 * @namespace Plugin
                                 */
                            
                                var SortScroll = function() {
                                    SortScroll.superclass.constructor.apply(this, arguments);
                                };
                            
                                Y.extend(SortScroll, Y.Base, {
                                    initializer: function() {
                                        var host = this.get('host');
                                        host.plug(Y.Plugin.DDNodeScroll, {
                                            node: host.get('container')
                                        });
                                        host.delegate.on('drop:over', function(e) {
                                            if (this.dd.nodescroll && e.drag.nodescroll) {
                                                e.drag.nodescroll.set('parentScroll', Y.one(this.get('container')));
                                            }
                                        });
                                    }
                                }, {
                                    ATTRS: {
                                        host: {
                                            value: ''
                                        }
                                    },
                                    /**
                                    * @property NAME
                                    * @default SortScroll
                                    * @readonly
                                    * @protected
                                    * @static
                                    * @description The name of the class.
                                    * @type {String}
                                    */
                                    NAME: 'SortScroll',
                                    /**
                                    * @property NS
                                    * @default scroll
                                    * @readonly
                                    * @protected
                                    * @static
                                    * @description The scroll instance.
                                    * @type {String}
                                    */
                                    NS: 'scroll'
                                });
                            
                            
                                Y.namespace('Y.Plugin');
                                Y.Plugin.SortableScroll = SortScroll;