Accounting/Export/AccountingWriter.php
public function configure($subject)
    {
        if ($subject instanceof InvoiceInterface) {
            $this->date = $subject->getCreatedAt()->format('Y-m-d');
        } elseif ($subject instanceof PaymentInterface) {
            $this->date = $subject->getCompletedAt()->format('Y-m-d');
        } else {
            throw new InvalidArgumentException(
                "Expected instance of " . InvoiceInterface::class . " or " . PaymentInterface::class
            );
        }

        $this->number = $subject->getNumber();

        $sale = $subject->getSale();

        if ($customer = $sale->getCustomer()) {
            $this->identity = $customer->getFirstName() . ' ' . $customer->getLastName();
        } else {
            $this->identity = $sale->getFirstName() . ' ' . $sale->getLastName();
        }
    }
public function configure($subject)
    {
        if ($subject instanceof InvoiceInterface) {
            $this->date = $subject->getCreatedAt()->format('Y-m-d');
        } elseif ($subject instanceof PaymentInterface) {
            $this->date = $subject->getCompletedAt()->format('Y-m-d');
        } else {
            throw new InvalidArgumentException(
                "Expected instance of " . InvoiceInterface::class . " or " . PaymentInterface::class
            );
        }

        $this->number = $subject->getNumber();

        $sale = $subject->getSale();

        if ($customer = $sale->getCustomer()) {
            $this->identity = $customer->getFirstName() . ' ' . $customer->getLastName();
        } else {
            $this->identity = $sale->getFirstName() . ' ' . $sale->getLastName();
        }
    }
Configures the writer for the given subject.

@param InvoiceInterface|PaymentInterface $subject