code: public DateTimeFormatter withOffsetParsed() {
          if (iOffsetParsed == true) {
              return this;
          }
          return new DateTimeFormatter(iPrinter, iParser, iLocale,
                  true, iChrono, null, iPivotYear, iDefaultYear);
      }
docs: Returns a new formatter that will create a datetime with a time zone
  equal to that of the offset of the parsed string.
  <p>
  After calling this method, a string '2004-06-09T10:20:30-08:00' will
  create a datetime with a zone of -08:00 (a fixed zone, with no daylight
  savings rules). If the parsed string represents a local time (no zone
  offset) the parsed datetime will be in the default zone.
  <p>
  Calling this method sets the override zone to null.
  Calling the override zone method sets this flag off.
  
  @return the new formatter