When you import a module into Swift code, you expect the result to be entirely additive. But as we’ll see, this isn’t always the case.

Making a claim that something will never be the case can feel like an invitation for the universe to prove otherwise. Fortunately for us, Swift lives up to this higher standard thanks to the unlikeliest of types.

Void has no members: no methods, no values, not even a name. It’s a something more nothing than nil.