执行跳出循环后，我们假设实例状态是下面两个值之一。
Once the execution is out of the loop, let's assume that the instance state is one of two values.
例如，假设实例化数的界限为42，并且使用用户提供的参数调用先前提到的nest方法。
For example, suppose the bound on the number of instantiations were 42 and the nest method mentioned earlier was being called with a user-supplied argument.
由于大型应用程序中组件的通信方式，所以假设对象实例的创建者就是它的用户并不总是安全的。
Because of the way components in large applications communicate, it's not always safe to assume that the creator of an object instance is its user.
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