Not OP, but it's useful for if:

- something is done to object when some props is set or validation, such as .withStuffedCrust("cheese"), it'll set the internal props as crust="stuffed" and stuffContent="cheese"

- it's branching. So rather than making user looking for the components or configuration themselves, library author can guide them with builder. Such as:

  myVehicleBuilder.withSixTires().withTrailerAttachment().attach(container)

In this case withTrailerAttachment (and possibly withOpenBack or withBox) won't show up if you call withTwoTires(), and attach won't show up if you don't call withTrailerAttachment().

In my example the could matter, or not. I see this all the times. In your example, can you make the order matter? In my example, after each selection, you can limit or expand the further options.