code: public TDClientConfig buildConfig()
      {
          return new TDClientConfig(
                  endpoint,
                  port,
                  useSSL,
                  apiKey,
                  user,
                  password,
                  proxy,
                  retryLimit,
                  retryInitialIntervalMillis,
                  retryMaxIntervalMillis,
                  retryMultiplier,
                  connectTimeoutMillis,
                  readTimeoutMillis,
                  connectionPoolSize,
                  headers);
      }
docs: Build a config object.
  
  @return