public void nextGroup() throws SAException {
  if (_curGroupValue != null) {
    if (_alreadyUsedGroupValues == null)     _alreadyUsedGroupValues=new HashSet<Object>();
    _alreadyUsedGroupValues.add(_curGroupValue);
    _curGroupValue=null;
  }
}

public void nextGroup ( ) throws SAException { if ( _curGroupValue != null ) { if ( _alreadyUsedGroupValues == null ) _alreadyUsedGroupValues = new HashSet < Object > ( ) ; _alreadyUsedGroupValues . add ( _curGroupValue ) ; _curGroupValue = null ; } }
move to next group - value
