System/Library/PrivateFrameworks/SetupAssistantUI.framework

BFFBarButtonSpinnerView.h

Download BFFBarButtonSpinnerView.h

1. NSObject
2. >
3. UIBarItem
4. >
5. UIBarButtonItem

@class UIActivityIndicatorView;

@interface BFFBarButtonSpinnerView : UIBarButtonItem {
    UIActivityIndicatorView *_spinner;
}

- (void)stopAnimating;
- (id)init;
- (void)startAnimating;
- (void).cxx_destruct;

@end