code: protected final void setHttpProxyHost(String proxyHost) {
          httpConf = new MyHttpClientConfiguration(proxyHost
                  , httpConf.getHttpProxyUser()
                  , httpConf.getHttpProxyPassword()
                  , httpConf.getHttpProxyPort()
                  , httpConf.isHttpProxySocks()
                  , httpConf.getHttpConnectionTimeout()
                  , httpConf.getHttpReadTimeout()
                  , httpConf.isPrettyDebugEnabled(), httpConf.isGZIPEnabled()
          );
      }
docs: methods for HttpClientConfiguration