如同我们在XMBuilder一节所讨论的那样，构建器应该通过从build方法返回对那些项目感兴趣的内容来注册它们。

As we discussed in the XMBuilder section, your builder should register interest in those projects by returning them from the build method.

youdao

PROCESS_SKIP——访问程序对该节点的子节点不感兴趣，所以accept返回true。

PROCESS_SKIP — the visitor isn't interested in the node's children, so accept returns true.

youdao

环境中的 getSource() 方法应该返回对 UML 类的引用，因为我们在扩展点中指定我们只对 Class transforms 感兴趣。

The getSource() method on the context should return a reference to a UML class, since we specified in the extension point that we were interested only in Class transforms.

youdao

Now, the one that we're most interested in ANS is the one where, in fact, it gets out ANS, so you see down here in the code, there's a spot where it's going to return the value of ANS, which is what we want, right? That's the thing that holds the value that we intended to have.

现在我们最感兴趣的是这个,事实上它返回的是，所以你看这段代码,在这里返回ANS值,也就是我们想要的,对吧？,它就承载了我们想得到的值。

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