As documentation mentioned that a RIB can be viewable or viewless, it is found that viewable RIB must be associated with UIViewController. However, I think it is not possible and most viewable RIB should be UIView-based as RIBs framework encouraging us to make reusable and micro components.

As the below image shown, are those viewable RIBs (Confirmation, Location Refinements, Menu) UIViewCont