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What about Joe's Design?

For many, Joe the box is the first sizeable Smalltalk code you see. What do you think about the way it is organized? Should NamedBox be a subclass of Box? Should #undraw really rely on #drawColor:? Is the lazy evaluation of the 'name' instance variable a good thing? Overall, what strikes you about Box and NamedBock, either good or bad?

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