find($id); if ($line) { return $line->update($data); } return false; } public function delete(string $id): bool { $line = $this->find($id); if ($line) { return $line->delete(); } return false; } public function find(string $id): ?InvoiceLine { return InvoiceLine::find($id); } public function getByInvoiceId(string $invoiceId) { return InvoiceLine::where('invoice_id', $invoiceId)->get(); } }