public async Task ReadAsync_RequestObject()
        {
            // Snippet: ReadAsync(ReadRequest,CallSettings)
            // Create client
            SpannerClient spannerClient = await SpannerClient.CreateAsync();

            // Initialize request argument(s)
            ReadRequest request = new ReadRequest
            {
                Session = new SessionName("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").ToString(),
                Table   = "",
                Columns = { },
                KeySet  = new KeySet(),
            };
            // Make the request
            ResultSet response = await spannerClient.ReadAsync(request);

            // End snippet
        }