@interface FaceTimeMessageStore.VoicemailDiffableDataSource : _TtCs12_SwiftObject {
    void /* unknown type, empty encoding */ voicemailsInserted;
    void /* unknown type, empty encoding */ voicemailsDeleted;
    void /* unknown type, empty encoding */ voicemailsChanged;
    void /* unknown type, empty encoding */ voicemailDataSource;
    void /* unknown type, empty encoding */ queue;
    void /* unknown type, empty encoding */ isPerformingDiff;
    void /* unknown type, empty encoding */ notificationsReceived;
}

- (void)voicemailsChangedHandlerWithNotification:(id)a0;

@end