public async Task GetIamPolicyAsync()
        {
            // Snippet: GetIamPolicyAsync(string,CallSettings)
            // Additional: GetIamPolicyAsync(string,CancellationToken)
            // Create client
            PublisherClient publisherClient = PublisherClient.Create();
            // Initialize request argument(s)
            string formattedResource = PublisherClient.FormatTopicName("[PROJECT]", "[TOPIC]");
            // Make the request
            Policy response = await publisherClient.GetIamPolicyAsync(formattedResource);

            // End snippet
        }
        public async Task GetIamPolicyAsync_RequestObject()
        {
            // Snippet: GetIamPolicyAsync(GetIamPolicyRequest,CallSettings)
            // Create client
            PublisherClient publisherClient = await PublisherClient.CreateAsync();

            // Initialize request argument(s)
            GetIamPolicyRequest request = new GetIamPolicyRequest
            {
                Resource = new TopicName("[PROJECT]", "[TOPIC]").ToString(),
            };
            // Make the request
            Policy response = await publisherClient.GetIamPolicyAsync(request);

            // End snippet
        }