You need to know the used methods to review either way (when you really review code, which is not done by most people). You need to read the doc either way. At

You need to know the used methods to review either way (when you really review code, which is not done by most people). You need to read the doc either way. At that point you could just write the code yourself. And as many examples showed (e.g. https://news.ycombinator.com/item?id=41307387 https://news.ycombinator.com/item?id=41307387), it’s not even that quick.