subprojects/parseq-http-client/src/main/java/com/linkedin/parseq/httpclient/HttpClient.java
public static synchronized AsyncHttpClient getNingClient() {
    if (_client.get() == null) {
      initialize(new AsyncHttpClientConfig.Builder().build());
    }
    return _client.get();
  }
public static synchronized AsyncHttpClient getNingClient() {
    if (_client.get() == null) {
      initialize(new AsyncHttpClientConfig.Builder().build());
    }
    return _client.get();
  }
Returns raw http client. If client has not been initialized yet
then new client is created with default configuration.
@return raw http client