Akka.Configuration.Config.GetString C# (CSharp) Method

        public virtual string GetString(string path, string @default = null)
        {
            HoconValue value = GetNode(path);
            if (value == null)
                return @default;

            return value.GetString();
        }

        /// <summary>
        /// Performs configuration
        /// </summary>
        /// <param name="configuration">Previous configuration</param>
        /// <param name="config">Akka configuration</param>
        /// <returns>Updated configuration</returns>
        public LoggerConfiguration Configure(LoggerConfiguration configuration, Config config)
        {
            var minimumLevel = config.GetString("ClusterKit.Log.ElasticSearch.minimumLevel", "none")?.Trim();

            LogEventLevel level;
            if (!Enum.TryParse(minimumLevel, true, out level))
            {
                return configuration;
            }

            var nodes = config.GetStringList("ClusterKit.Log.ElasticSearch.nodes");

            var indexFormat = config.GetString("ClusterKit.Log.ElasticSearch.indexFormat", "logstash-{0:yyyy.MM.dd}");

            Log.Information(
                "{Type}: \n\tMinimum level: {MinimumLevel}\n\tIndex format: {IndexFormat}\n\tNodes:\n\t\t{NodeList}\n",
                this.GetType().FullName,
                minimumLevel,
                indexFormat,
                string.Join("\n\t\t", nodes));


            SelfLog.Enable(Console.WriteLine);
            var options = new ElasticsearchSinkOptions(nodes.Select(s => new Uri(s)))
                              {
                                  MinimumLogEventLevel = level,
                                  AutoRegisterTemplate = true,
                                  IndexFormat = indexFormat
                              };

            return configuration.WriteTo.Elasticsearch(options);


        }