@Override
  public ProxySelector getProxySelector(String pacUrlForUse) {
    ProxySelector newProxySelector;
    if (pacUrlForUse == null) {
      final ProxySearch proxySearch = getDefaultProxySearchStrategy();
      newProxySelector = proxySearch.getProxySelector();
    }
    else {
      newProxySelector = new PacProxySelector(new UrlPacScriptSource(pacUrlForUse));
    }
    return newProxySelector;
  }
@Override
  public ProxySelector getProxySelector(String pacUrlForUse)