在Laravel excel 3.1中，有没有办法冻结Excel的第一行？

use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\ShouldAutoSize;
use Maatwebsite\Excel\Concerns\WithEvents;
use Maatwebsite\Excel\Events\AfterSheet;

class MyExport implements WithHeadings, ShouldAutoSize, WithEvents
{
    public function headings(): array
    {
        return [
            'Column 1',
            'Column 2',
            'Column 3',
        ];
    }

    public function registerEvents(): array
    {
        return [
            AfterSheet::class => function(AfterSheet $event) {
                $event->sheet->freezeFirstRow();
            },
        ];
    }
}