code: public String go() {
  		StringWriter sw = new StringWriter();
  		try {
  			go(sw);
  		} catch (IOException e) {
  			//should never be thrown because we're writing to a string
  			throw new RuntimeException(e);
  		}
  		return sw.toString();
  	}
docs: Writes the iCalendar objects to a string.
  @return the iCalendar string