/// <summary>Snippet for UpdateApiConfig</summary>
        /// <remarks>
        /// This snippet has been automatically generated for illustrative purposes only.
        /// It may require modifications to work in your environment.
        /// </remarks>
        public void UpdateApiConfigRequestObject()
        {
            // Create client
            ApiGatewayServiceClient apiGatewayServiceClient = ApiGatewayServiceClient.Create();
            // Initialize request argument(s)
            UpdateApiConfigRequest request = new UpdateApiConfigRequest
            {
                UpdateMask = new FieldMask(),
                ApiConfig  = new ApiConfig(),
            };
            // Make the request
            Operation <ApiConfig, OperationMetadata> response = apiGatewayServiceClient.UpdateApiConfig(request);

            // Poll until the returned long-running operation is complete
            Operation <ApiConfig, OperationMetadata> completedResponse = response.PollUntilCompleted();
            // Retrieve the operation result
            ApiConfig 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 <ApiConfig, OperationMetadata> retrievedResponse = apiGatewayServiceClient.PollOnceUpdateApiConfig(operationName);

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