如何设置Excel行的样式取决于数据？

Documentation says the following:

// ...
use Maatwebsite\Excel\Concerns\WithEvents;
use Maatwebsite\Excel\Events\AfterSheet;

class UsersExport implements FromCollection, WithHeadings, ShouldAutoSize, WithEvents
{

    // ...

    /**
     * @return array
     */
    public function registerEvents(): array
    {
        return [
            AfterSheet::class    => function(AfterSheet $event) {
                $cellRange = 'A1:W1'; // All headers
                $event->sheet->getDelegate()->getStyle($cellRange)->getFont()->setSize(14);
            },
        ];
    }

}

Where $cellRange = 'A1:W1'; is range what I want to change.

I use collections method to get all data from db:

class VisitorsExport implements FromCollection, WithHeadings, WithEvents
{
    public function collection()
    {
       return $visitors =  Visitor::all();
    }
}

Could I iterate result $visitors and assign color for concrete row?

I mean like this:

$visitors->map(function($item) {

     if($item->id == 1) {
         $item->cell()->style()->backgroundcolor('#ccc');
     }
});

I tried this code:

Excel::store($sheet, $path.$filename, function($excel) {
    $excel->sheet('Sheetshit', function($sheet) use($main_arr) {
        dd($main_arr);
    });
});