invoices = $invoices; } public function array(): array { return $this->invoices; } public function headings(): array { return ['UPT', 'TOTAL RT TERBIT', 'RT TERBAYAR', 'SUDAH DI-TL UPT','%', 'BELUM DI-TL UPT', '%', 'JUMLAH RT', '%','TANGGAL UPLOAD']; } public function startCell(): string { return 'A1'; } }