Adds a registered protocol to another protocol that is under construction.
- iOS 4.3+
- macOS 10.7+
- tvOS 9.0+
- watchOS 1.0+
The protocol you want to add the registered protocol to.
The registered protocol you want to add to
The protocol you want to add to (
proto) must be under construction—allocated but not yet registered with the Objective-C runtime. The protocol you want to add (
addition) must be registered already.