@interface ActivityKit.ActivityOutputClient : _TtCs12_SwiftObject {
    void /* unknown type, empty encoding */ identifier;
    void /* unknown type, empty encoding */ singleton;
    void /* unknown type, empty encoding */ lock;
    void /* unknown type, empty encoding */ _lock_options;
    void /* unknown type, empty encoding */ _lock_payloadObserverCount;
    void /* unknown type, empty encoding */ _lock_descriptorObserverCount;
}

@end