This class and protocol were incorrectly added to our macOS bindings.
The catch is that we can't remove them because it would break backwards
compatibility, so mark them for removal in XAMCORE_4_0.
- Fixes bug #59272: [xtro] Report !missing-protocol-conformance! when protocols are defined in categories
(https://bugzilla.xamarin.com/show_bug.cgi?id=59272)
- Implemented missing protocol conformances based on tool's new data.
- Remove Internal check from VisitObjCCategoryDecl and VisitObjCInterfaceDecl
- Ignore previewItemTitle failure (normal since it's optional)
- Only skip UIStateRestoring for subclasses of UIViewController
- Ignore UIStateRestoring test on watchOS (UIViewController not available)
- Remove protocol conformances that generated wrong availability attributes (https://github.com/xamarin/xamarin-macios/issues/3213)
- Avoid new virtual or virtual when adding protocol conformance (https://github.com/xamarin/xamarin-macios/issues/3217)
* Not every old annotations have been migrated (work in progress, to be completed in another PR);
* Sanitation of the data files (e.g. removal of dupes and fixed, by Apple, entries) is done, but not automated (also a work in progress)
Even then this is immediately useful, i.e. better merged before 15.6 gets branched.