public Boundsheet getLastSheet()
	{
		if( parent_rec != null )
		{
			WorkBook wb = parent_rec.getWorkBook();
			if( (wb != null) && (wb.getExternSheet() != null) )
			{
				Boundsheet[] bsa = wb.getExternSheet().getBoundSheets( ixti );
				if( bsa != null )
				{
					if( bsa.length > 1 )
					{
						return bsa[bsa.length - 1];
					}
					return bsa[0];
				}

			}
		}
		return null;
	}