/// <summary>
        /// Constructs a client wrapper for the TopicConstantService service, with the specified gRPC client and settings.
        /// </summary>
        /// <param name="grpcClient">The underlying gRPC client.</param>
        /// <param name="settings">The base <see cref="TopicConstantServiceSettings"/> used within this client </param>
        public TopicConstantServiceClientImpl(TopicConstantService.TopicConstantServiceClient grpcClient, TopicConstantServiceSettings settings)
        {
            GrpcClient = grpcClient;
            TopicConstantServiceSettings effectiveSettings = settings ?? TopicConstantServiceSettings.GetDefault();
            gaxgrpc::ClientHelper        clientHelper      = new gaxgrpc::ClientHelper(effectiveSettings);

            _callGetTopicConstant = clientHelper.BuildApiCall <GetTopicConstantRequest, gagvr::TopicConstant>(
                GrpcClient.GetTopicConstantAsync, GrpcClient.GetTopicConstant, effectiveSettings.GetTopicConstantSettings);
            Modify_ApiCall(ref _callGetTopicConstant);
            Modify_GetTopicConstantApiCall(ref _callGetTopicConstant);
            OnConstruction(grpcClient, effectiveSettings, clientHelper);
        }