NewsletterRecipientCollection example

'option' => 'direct',
            'firstName' => 'Y',
            'lastName' => 'Tran',
        ]);

        $newsletterRecipientEntity = new NewsletterRecipientEntity();
        $newsletterRecipientEntity->setId(Uuid::randomHex());
        $newsletterRecipientEntity->setConfirmedAt(new \DateTime());

        $entityRepository = new StaticEntityRepository([
            [$newsletterRecipientEntity->getId()],
            new NewsletterRecipientCollection([$newsletterRecipientEntity]),
        ]);

        $systemConfig = new StaticSystemConfigService([
            TestDefaults::SALES_CHANNEL => [
                'core.newsletter.doubleOptIn' => true,
            ],
        ]);

        $eventDispatcher = $this->createMock(EventDispatcherInterface::class);
        $eventDispatcher
            ->expects(static::once())