docs: function (name, items) {
      var List = this.get('List');
      var list = this.lists[name];
      if (typeof list === 'undefined') {
        var opts = lazy.clone(this.options);
        opts.items = items || this.items;
        opts.collection = this;
        this.lists[name] = list = new List(opts);
      }
      return list;
    }