如何在laravel maatwebsite中获取当前行号或单元格索引

use Maatwebsite\Excel\Concerns\WithMapping;

class ExportData implements WithMapping
{
    public function map($row): array
    {
        // 获取当前行号
        $rowIndex = $row->getIndex();

        // 获取单元格索引
        $cellIndex = $row->getCellIterator()->key();

        // 返回当前行的数据
        return [
            // 返回需要导出的数据
        ];
    }
}

use Maatwebsite\Excel\Facades\Excel;

class ExportController extends Controller
{
    public function export()
    {
        return Excel::download(new ExportData, 'data.xlsx');
    }
}