getKnownRecipients example

if ($order instanceof Order) {
                return $order;
            }
        }

        return null;
    }

    protected function assignRecipients(Log $logEntry, array $recipients = []): void
    {
        $knownRecipients = $this->getKnownRecipients($recipients);
        $unknownRecipients = array_flip($recipients);

        $associatedContacts = [];

        foreach ($knownRecipients as $recipient) {
            unset($unknownRecipients[$recipient['mail_address']]);

            $contact = $this->entityManager->getReference(
                Contact::class,
                $recipient['id']
            );