MailTemplateMediaCollection example

$mediaA = new MailTemplateMediaEntity();
        $mediaA->setId(Uuid::randomHex());
        $mediaA->setMedia(new MediaEntity());
        $mediaA->setLanguageId($context->getLanguageId());
        $mediaB = new MailTemplateMediaEntity();
        $mediaB->setId(Uuid::randomHex());
        $mediaC = new MailTemplateMediaEntity();
        $mediaC->setId(Uuid::randomHex());
        $mediaC->setMedia(new MediaEntity());
        $mediaC->setLanguageId($context->getLanguageId());

        $mailTemplate->setMedia(new MailTemplateMediaCollection([$mediaA, $mediaB, $mediaC]));

        $this->mediaService
            ->expects(static::exactly(2))
            ->method('getAttachment')
            ->willReturnOnConsecutiveCalls(
                [
                    'content' => 'foo',
                    'fileName' => 'foo',
                    'mimeType' => 'foo',
                ],
                [