/// <summary>Snippet for PreviewRealmUpdateAsync</summary>
        public async Task PreviewRealmUpdateRequestObjectAsync()
        {
            // Snippet: PreviewRealmUpdateAsync(PreviewRealmUpdateRequest, CallSettings)
            // Additional: PreviewRealmUpdateAsync(PreviewRealmUpdateRequest, CancellationToken)
            // Create client
            RealmsServiceClient realmsServiceClient = await RealmsServiceClient.CreateAsync();

            // Initialize request argument(s)
            PreviewRealmUpdateRequest request = new PreviewRealmUpdateRequest
            {
                Realm       = new Realm(),
                UpdateMask  = new FieldMask(),
                PreviewTime = new Timestamp(),
            };
            // Make the request
            PreviewRealmUpdateResponse response = await realmsServiceClient.PreviewRealmUpdateAsync(request);

            // End snippet
        }