Extension of a nested type in Swift

Question

I have a main class, also providing a namespace:

class A {
}

and a nested class added via an extension (all for the sake of using separate

Answer 1

this works in my playground, as expected

class A {
}
extension A {
    class B {
    }
}
extension A.B {
    func foo() {
        print("print from extension A.B")
    }
}
let ab = A.B()
ab.foo()    // print from extension A.B