code: public void bootstrap() throws ConfigurationException {
  
      XMLConfigurator configurator = new XMLConfigurator();
  
      for (String config : configs) {
        log.debug("Loading XMLTooling configuration " + config);
        configurator.load(Configuration.class.getResourceAsStream(config));
      }
    }
docs: Bootstrap method for this library.
  
  @throws ConfigurationException
  for config errors