public function serialize(OpenQuestion $openQuestion, array $options = [])
    {
        $serialized = [
            'contentType' => 'text',
            'maxLength' => $openQuestion->getAnswerMaxLength(),
        ];

        if (in_array(Transfer::INCLUDE_SOLUTIONS, $options)) {
            $serialized['solutions'] = [];
        }

        return $serialized;
    }