If I want to validate this code in a white box manner, I have to separate UI-specific code from business code, which requires some refactoring.

如果我想以白盒方式验证这段代码，就必须将特定于用户界面的代码与业务代码分开，这就需要进行重构。

Take refactoring as an example.

重构即为一例。

Refactoring the manifest file.

重构清单文件。

Another key part is refactoring.

另一个关键部分是重构。

Refactoring is a means to an end.

重构是达到目标的一种方法。