boolean isInSameGroup( Object currentGroupKey, Object previousGroupKey ) throws DataException
boolean isInSameGroup( Object currentGroupKey, Object previousGroupKey, Object groupStartValue, int currRowPos ) throws DataException
	boolean isInSameGroup( Object currentGroupKey, Object previousGroupKey )			throws DataException	{		if ( previousGroupKey == currentGroupKey )			return true;		if ( previousGroupKey == null || currentGroupKey == null )			return false;		return isSameGroup( currentGroupKey, previousGroupKey );	}