akaunting/app/Imports/Sales/Invoices.php

<?php

namespace App\Imports\Sales;

use App\Imports\Sales\Sheets\Invoices as Base;
use App\Imports\Sales\Sheets\InvoiceItems;
use App\Imports\Sales\Sheets\InvoiceItemTaxes;
use App\Imports\Sales\Sheets\InvoiceHistories;
use App\Imports\Sales\Sheets\InvoiceTotals;
use App\Imports\Sales\Sheets\InvoiceTransactions;
use Illuminate\Contracts\Queue\ShouldQueue;
use Maatwebsite\Excel\Concerns\Importable;
use Maatwebsite\Excel\Concerns\WithChunkReading;
use Maatwebsite\Excel\Concerns\WithMultipleSheets;

class Invoices implements ShouldQueue, WithChunkReading, WithMultipleSheets
{
    use Importable;

    public function sheets(): array
    {
        return [
            'invoices' => new Base(),
            'invoice_items' => new InvoiceItems(),
            'invoice_item_taxes' => new InvoiceItemTaxes(),
            'invoice_histories' => new InvoiceHistories(),
            'invoice_totals' => new InvoiceTotals(),
            'invoice_transactions' => new InvoiceTransactions(),
        ];
    }

    public function chunkSize(): int
    {
        return 100;
    }
}