Angular 多选下拉 |按字母排序

Angular Multiselect Dropdown | Sort Alphabetically

我想按字母顺序对列表进行排序。有人可以指导我吗?

JS- Fiddle Code

https://jsfiddle.net/22et6sao/619/
 <div ng-dropdown-multiselect="" options="example14data| orderBy:'label'" 
  selected-model="example14model" checkboxes="true" 
  extra-settings="example14settings"></div>

https://jsfiddle.net/22et6sao/620/