code: public static ProtocolStackConfigurator getStackConfigurator(URL url) throws Exception {
          checkForNullConfiguration(url);
          checkJAXPAvailability();
          return XmlConfigurator.getInstance(url);
      }
docs: Returns a protocol stack configurator based on the XML configuration provided at the specified URL.
  
  @param url a URL pointing to a JGroups XML configuration.
  @return a {@code ProtocolStackConfigurator} containing the stack configuration.
  @throws Exception if problems occur during the configuration of the protocol stack.