/// <summary>Snippet for UpdateTopicAsync</summary>
        public async Task UpdateTopicAsync_RequestObject()
        {
            // Snippet: UpdateTopicAsync(UpdateTopicRequest,CallSettings)
            // Create client
            PublisherServiceApiClient publisherServiceApiClient = await PublisherServiceApiClient.CreateAsync();

            // Initialize request argument(s)
            UpdateTopicRequest request = new UpdateTopicRequest
            {
                Topic      = new Topic(),
                UpdateMask = new FieldMask(),
            };
            // Make the request
            Topic response = await publisherServiceApiClient.UpdateTopicAsync(request);

            // End snippet
        }