bill_plz_transaction_summary_pkb = $bill_plz_transaction_summary_pkb; $this->bill_plz_transaction_summary_koop = $bill_plz_transaction_summary_koop; $this->date = $date; } public function sheets(): array { return [ new BillplzTransactionSummarySheet($this->bill_plz_transaction_summary_pkb, 'PKB (v2)', $this->date), new BillplzTransactionSummarySheet($this->bill_plz_transaction_summary_koop, 'KOPKB (v3)', $this->date), ]; } }