public async stt::Task BatchWriteRequestObjectAsync()
        {
            moq::Mock <Firestore.FirestoreClient> mockGrpcClient = new moq::Mock <Firestore.FirestoreClient>(moq::MockBehavior.Strict);
            BatchWriteRequest request = new BatchWriteRequest
            {
                Database = "databased8eee011",
                Writes   = { new Write(), },
                Labels   =
                {
                    {
                        "key8a0b6e3c",
                        "value60c16320"
                    },
                },
            };
            BatchWriteResponse expectedResponse = new BatchWriteResponse
            {
                WriteResults = { new WriteResult(), },
                Status       = { new gr::Status(), },
            };

            mockGrpcClient.Setup(x => x.BatchWriteAsync(request, moq::It.IsAny <grpccore::CallOptions>())).Returns(new grpccore::AsyncUnaryCall <BatchWriteResponse>(stt::Task.FromResult(expectedResponse), null, null, null, null));
            FirestoreClient    client = new FirestoreClientImpl(mockGrpcClient.Object, null);
            BatchWriteResponse responseCallSettings = await client.BatchWriteAsync(request, gaxgrpc::CallSettings.FromCancellationToken(st::CancellationToken.None));

            xunit::Assert.Same(expectedResponse, responseCallSettings);
            BatchWriteResponse responseCancellationToken = await client.BatchWriteAsync(request, st::CancellationToken.None);

            xunit::Assert.Same(expectedResponse, responseCancellationToken);
            mockGrpcClient.VerifyAll();
        }