willow-utils/src/main/java/com/btr/proxy/selector/pac/PacProxySelector.java
public static PacProxySelector buildPacSelectorForUrl(String url) {
    PacProxySelector result = null;
    PacScriptSource pacSource = new UrlPacScriptSource(url);
    if (pacSource.isScriptValid()) {
      result = new PacProxySelector(pacSource);
    }
    return result;
  }
public static PacProxySelector buildPacSelectorForUrl(String url) {
    PacProxySelector result = null;
    PacScriptSource pacSource = new UrlPacScriptSource(url);
    if (pacSource.isScriptValid()) {
      result = new PacProxySelector(pacSource);
    }
    return result;
  }
***********************************************************************
Build a PAC proxy selector for the given URL.

@param url
to fetch the PAC script from.
@return a PacProxySelector or null if it is not possible to build a working
selector.
**********************************************************************