code: public boolean isSupported(ICalVersion version) {
  		for (ICalVersion supportedVersion : supportedVersions) {
  			if (supportedVersion == version) {
  				return true;
  			}
  		}
  		return false;
  	}
docs: Determines if the parameter value is supported by the given iCalendar
  version.
  @param version the iCalendar version
  @return true if it is supported, false if not