@class UIViewController; @interface ASBackgroundObserver : NSObject @property (readonly, weak, nonatomic) UIViewController *viewController; @property (readonly, nonatomic) id /* block */ block; - (void)dealloc; - (void).cxx_destruct; - (void)_sceneDidEnterBackground:(id)a0; - (void)_hostDidEnterBackground:(id)a0; - (id)initWithViewController:(id)a0 block:(id /* block */)a1; @end