In personally, I thought that too! DocC is an amazing feature to create great documentation. It'd be so much better if we use that for internal symbols. Because in a big application, there would be a bunch of symbols and they might be internal since those needed by only application target.

-Deleted this post because it was not answer it's just a comment to this topic-

Additional notes for my question, I'm working on this like - ViewController - View - UINavigationBar - UICollectionView (laying out to fullscreen, content-inset managed by safe-area)

I guess, those values should be converted as Float or Double. ProgressView(value: Double(todos.itemsDone) / Double(todos.count)) does not work?

ObjectProvider that I implemented is just example code. it may have several issues from some aspects.