How with maatwebsite show border as simple line?

[sergeynilov]

In Laravel 8 app making excel page with maatwebsite/excel 3.1 I set border with code

    $event->sheet->setCellValue($priceSummaryCell, '=SUM('.$priceSummaryCellFormula.')');
    $styleFooterSummery = [
        'borders' => [
            'allBorders' => [
                'borderStyle' => \PhpOffice\PhpSpreadsheet\Style\Border::BORDER_DOUBLE, // BORDER_THICK BORDER_THIN
                'color'       => ['rgb' => '2f2f2f']
            ],
        ]
    ];

In my Libre Office 6 I see that all cells are bordered : https://prnt.sc/122veqp
But I need to show just line(not while cell) to split fooetr part from content rows.

If there are methods for this ?

Thanks!