Returns the child view controller that should be queried to see if its gestures should take precedence.
- iOS 11.0+
- Mac Catalyst 13.0+
When implementing a container view controller, override this method if one of your child view controllers defines screen-edge gestures that should take precedence over the system gestures. UIKit then uses the
preferred property of the returned child view controller to determine which screen edges have competing gesture recognizers.