code: public Calendar build(final UnfoldingReader uin) throws IOException, ParserException {
          parser.parse(uin, contentHandler);
          return calendar;
      }
docs: Build an iCalendar model by parsing data from the specified reader.
  
  @param uin an unfolding reader to read data from
  @return a calendar parsed from the specified reader
  @throws IOException     where an error occurs reading data from the specified reader
  @throws ParserException where an error occurs parsing data from the reader