DestinationUserNameProvider (Spring Framework 4.3.30.RELEASE API)

```
public interface DestinationUserNameProvider
```
A Principal can also implement this contract when getName() isn't globally unique and therefore not suited for use with "user" destinations.
从以下版本开始:
4.0.1
作者:
Rossen Stoyanchev
另请参阅:
UserDestinationResolver

- 方法概要
  所有方法实例方法抽象方法
  修饰符和类型方法说明
  String getDestinationUserName()
  Return a globally unique user name for use with "user" destinations.

- 方法详细资料
  - getDestinationUserName
```
String getDestinationUserName()
```
    Return a globally unique user name for use with "user" destinations.