Do not use nested types if they need to be instantiated by client code.

如果需要由客户端代码实例化类型，则不要使用嵌套类型。

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Nested types in the same body can also access those private members.

同一体中的嵌套类型也可以访问那些私有成员。

youdao

Nested types in the same body can also access those private members.

同一体中的嵌套类型也可以访问那些私有成员。

youdao