“Cannot inherit from non-open class” swift

Question

As of Xcode 8 beta 6 I now get the compile error \"Cannot inherit from non-open class (Class)\" outside of its defining module\"

The class I was inheriting from was

Answer 1

Found the answer myself.

In Swift 3 you can now mark a class as open instead of public this allows files outside of the module to subclass that class.

Simply replace public in your module class with open.

Reference here.