void clientStreaming(size_t amount)
    {
        api::ClientStreamingRequest request;
        api::ClientStreamingResponse response;
        const auto stream = mClient.streamClientStreaming(request);
        QObject::connect(stream.get(), &QGrpcOperation::finished, &mClient, [stream]() {
            handleFinished<api::ClientStreamingResponse>("clientStreaming", stream);
        });

        size_t count = 0;
        while (count++ < amount) {
            request.setPing(count);
            qDebug() << "Client clientStreaming: ping " << request.ping();
            stream->sendMessage(request);
        }
        // QTimer::singleShot(200, [stream](){
        //     stream->writesDone();
        // });
        stream->writesDone();
    }

qt.grpc: Attempt sending headers to the ended stream
qt.grpc: "ClientStreaming" call "api.TestService" stream error:  "Unable to create an HTTP/2 stream"