code: public static Calendar load(final URL url) throws IOException, ParserException {
          final CalendarBuilder builder = new CalendarBuilder();
          return builder.build(url.openStream());
      }
docs: Loads a calendar from the specified URL.
  @param url the URL from which to load calendar data
  @return returns a new calendar instance initialised from the specified URL
  @throws IOException occurs when there is an error reading from the specified URL
  @throws ParserException occurs when the data in the specified URL is invalid