如何导出内嵌类？

[tnie]

导出内嵌类 无特殊性：导出外层类，会自动导出其内嵌类。

By the way, exporting a class doesn't mean that its nested classes get exported, you need to mark up all of them explicitly. 引用来源

会有单独导出内嵌类（不到处外层类）的需求吗 ？