I have attempted to make a simple example (Swift framework with single class and single method with @objc annotations), I created a iOS Binding solution to wrap the framework for Xamarin iOS App to consume it. When I added the `ApiDefinition.cs` to the project and set its build action on ObjcBindingApiDefinition I get errors on using statements i.e The type or namespace name ObjectiveC could not be found. Are you missing an assembly reference?

Any help would be appreciated :)
Thanks