code: public static void fillProperties(Properties props, String resourceName)
              throws IOException {
          fillProperties(props, resourceName, AspectranClassLoader.getDefaultClassLoader());
      }
docs: Fill the given properties from the specified class path resource (in ISO-8859-1 encoding).
  <p>Merges properties if more than one resource of the same name
  found in the class path.</p>
  
  @param props the Properties instance to load into
  @param resourceName the name of the class path resource
  @throws IOException if loading failed