@ApiStatus.Internal
  public static Map<String, String> getOldStyleProperties() {
    final Map<String, String> props = new HashMap<>();
    props.put(JavaProxyProperty.HTTP_HOST, System.getProperty(JavaProxyProperty.HTTP_HOST));
    props.put(JavaProxyProperty.HTTPS_HOST, System.getProperty(JavaProxyProperty.HTTPS_HOST));
    props.put(JavaProxyProperty.SOCKS_HOST, System.getProperty(JavaProxyProperty.SOCKS_HOST));
    return props;
  }
@ApiStatus.Internal
  public static Map<String, String> getOldStyleProperties()