partial void OnCopy(ExtensionFeedItemServiceSettings existing);
        /// <summary>
        /// Constructs a client wrapper for the ExtensionFeedItemService service, with the specified gRPC client and
        /// settings.
        /// </summary>
        /// <param name="grpcClient">The underlying gRPC client.</param>
        /// <param name="settings">
        /// The base <see cref="ExtensionFeedItemServiceSettings"/> used within this client.
        /// </param>
        public ExtensionFeedItemServiceClientImpl(ExtensionFeedItemService.ExtensionFeedItemServiceClient grpcClient, ExtensionFeedItemServiceSettings settings)
        {
            GrpcClient = grpcClient;
            ExtensionFeedItemServiceSettings effectiveSettings = settings ?? ExtensionFeedItemServiceSettings.GetDefault();
            gaxgrpc::ClientHelper            clientHelper      = new gaxgrpc::ClientHelper(effectiveSettings);

            _callGetExtensionFeedItem = clientHelper.BuildApiCall <GetExtensionFeedItemRequest, gagvr::ExtensionFeedItem>(grpcClient.GetExtensionFeedItemAsync, grpcClient.GetExtensionFeedItem, effectiveSettings.GetExtensionFeedItemSettings).WithGoogleRequestParam("resource_name", request => request.ResourceName);
            Modify_ApiCall(ref _callGetExtensionFeedItem);
            Modify_GetExtensionFeedItemApiCall(ref _callGetExtensionFeedItem);
            _callMutateExtensionFeedItems = clientHelper.BuildApiCall <MutateExtensionFeedItemsRequest, MutateExtensionFeedItemsResponse>(grpcClient.MutateExtensionFeedItemsAsync, grpcClient.MutateExtensionFeedItems, effectiveSettings.MutateExtensionFeedItemsSettings).WithGoogleRequestParam("customer_id", request => request.CustomerId);
            Modify_ApiCall(ref _callMutateExtensionFeedItems);
            Modify_MutateExtensionFeedItemsApiCall(ref _callMutateExtensionFeedItems);
            OnConstruction(grpcClient, effectiveSettings, clientHelper);
        }
 partial void OnConstruction(ExtensionFeedItemService.ExtensionFeedItemServiceClient grpcClient, ExtensionFeedItemServiceSettings effectiveSettings, gaxgrpc::ClientHelper clientHelper);
        /// <summary>
        /// Creates a <see cref="ExtensionFeedItemServiceClient"/> which uses the specified call invoker for remote
        /// operations.
        /// </summary>
        /// <param name="callInvoker">
        /// The <see cref="grpccore::CallInvoker"/> for remote operations. Must not be null.
        /// </param>
        /// <param name="settings">Optional <see cref="ExtensionFeedItemServiceSettings"/>.</param>
        /// <returns>The created <see cref="ExtensionFeedItemServiceClient"/>.</returns>
        internal static ExtensionFeedItemServiceClient Create(grpccore::CallInvoker callInvoker, ExtensionFeedItemServiceSettings settings = null)
        {
            gax::GaxPreconditions.CheckNotNull(callInvoker, nameof(callInvoker));
            grpcinter::Interceptor interceptor = settings?.Interceptor;

            if (interceptor != null)
            {
                callInvoker = grpcinter::CallInvokerExtensions.Intercept(callInvoker, interceptor);
            }
            ExtensionFeedItemService.ExtensionFeedItemServiceClient grpcClient = new ExtensionFeedItemService.ExtensionFeedItemServiceClient(callInvoker);
            return(new ExtensionFeedItemServiceClientImpl(grpcClient, settings));
        }