/// <summary>Snippet for CreateClusterAsync</summary>
        public async Task CreateClusterAsync()
        {
            // Snippet: CreateClusterAsync(string, string, Cluster, CallSettings)
            // Additional: CreateClusterAsync(string, string, Cluster, CancellationToken)
            // Create client
            ClusterControllerClient clusterControllerClient = await ClusterControllerClient.CreateAsync();

            // Initialize request argument(s)
            string  projectId = "";
            string  region    = "";
            Cluster cluster   = new Cluster();
            // Make the request
            Operation <Cluster, ClusterOperationMetadata> response = await clusterControllerClient.CreateClusterAsync(projectId, region, cluster);

            // Poll until the returned long-running operation is complete
            Operation <Cluster, ClusterOperationMetadata> completedResponse = await response.PollUntilCompletedAsync();

            // Retrieve the operation result
            Cluster result = completedResponse.Result;

            // Or get the name of the operation
            string operationName = response.Name;
            // This name can be stored, then the long-running operation retrieved later by name
            Operation <Cluster, ClusterOperationMetadata> retrievedResponse = await clusterControllerClient.PollOnceCreateClusterAsync(operationName);

            // Check if the retrieved long-running operation has completed
            if (retrievedResponse.IsCompleted)
            {
                // If it has completed, then access the result
                Cluster retrievedResult = retrievedResponse.Result;
            }
            // End snippet
        }