@protocol NNMKMessageContentSyncServiceClientDelegate; @interface NNMKMessageContentSyncServiceClient : NNMKSyncServiceEndpoint @property (weak, nonatomic) id<NNMKMessageContentSyncServiceClientDelegate> delegate; - (id)initWithQueue:(id)a0; - (void)failedSendingProtobufWithIDSIdentifier:(id)a0 errorCode:(long long)a1; - (void).cxx_destruct; - (void)successfullySentProtobufWithIDSIdentifier:(id)a0; - (void)readProtobufData:(id)a0 type:(unsigned long long)a1; @end