@interface _NAUIAutoUpdatingFontObserver : NSObject { id _notificationObserver; } @property (readonly, weak, nonatomic) id target; + (BOOL)canObserveFontsForTarget:(id)a0; - (void)dealloc; - (void)updateDyamicFontForCurrentContentSize; - (void).cxx_destruct; - (id)initWithTarget:(id)a0; @end