@interface SiriTTSService.SynthesisCacheWritingAction : _TtCs12_SwiftObject {
    void /* unknown type, empty encoding */ asyncContext;
    void /* unknown type, empty encoding */ _invalidated;
    void /* unknown type, empty encoding */ cacheStorage;
    void /* unknown type, empty encoding */ cacheFile;
    void /* unknown type, empty encoding */ cacheHashKey;
    void /* unknown type, empty encoding */ cachingQueue;
    void /* unknown type, empty encoding */ internalSettings;
    void /* unknown type, empty encoding */ notificationCenter;
    void /* unknown type, empty encoding */ observers;
}

@end