code: public static RHExtension hasRHExtensions(ConfigImpl config, ExtensionDefintion ed) throws PageException, SAXException, IOException {
  	XMLConfigAdmin admin = new XMLConfigAdmin(config, null);
  	return admin._hasRHExtensions(config, ed);
      }
docs: returns the version if the extension is available
  
  @param config
  @param id
  @return
  @throws PageException
  @throws IOException
  @throws SAXException