更改属性后，Telerik TreeList不刷新

Question

改变扩展属性后在其模式不更新上的视图。

$scope.kendogridOptions.dataSource.options.schema.model.expanded = !$scope.kendogridOptions.dataSource.options.schema.model.expanded;
        console.log($scope.kendogridOptions.dataSource);
        $scope.kendogridOptions.dataSource.fetch(); -- Not Working
        $scope.kendogridOptions.dataSource.read(); -- Not Working