If a deep clone is not returned, the run-time behavior is undefined.

如果未返回深层克隆，则运行时行为将不可确定。

youdao

This method returns a copy that is a deep clone of your binding context.

此方法返回作为绑定上下文的深层克隆的副本。

youdao

This method returns a copy that is a deep clone of your binding context.

此方法返回作为绑定上下文的深层克隆的副本。

youdao