code: public static void start(URL configFile, URL propertiesFile) {
          Resource configResource = configFile != null ? new UrlResource(configFile) : null;
          Resource propertiesResource = propertiesFile != null ? new UrlResource(propertiesFile) : null;
          start(configResource, propertiesResource);
      }
docs: Starts the galaxy server.
  @param configFile The path to the xml (spring) configuration file {@code null} null for default.
  @param propertiesFile The name of the properties file containing the grid's properties.
  You may, of course use Spring's {@code <context:property-placeholder location="classpath:com/foo/bar.properties"/>} but this parameter is helpful when you want to use the same xml configuration
  with different properties for different instances.