@class NSString, MNObserverHashTable, MNUserOptions; @interface MNUserOptionsEngine : NSObject { MNObserverHashTable *_observers; NSString *_navSessionLanguage; } @property (readonly, nonatomic) NSString *currentVoiceLanguage; @property (readonly, nonatomic) MNUserOptions *options; + (id)sharedInstance; - (id)localizedStringForKey:(id)a0; - (void)update:(id)a0; - (id)init; - (void)removeObserver:(id)a0; - (void)updateNavigationSessionLanguage:(id)a0; - (void).cxx_destruct; - (void)addObserver:(id)a0; @end