public function serialize(CellChoice $choice, array $options = [])
    {
        $serialized = [
            'text' => $choice->getText(),
            'caseSensitive' => $choice->isCaseSensitive(),
            'score' => $choice->getScore(),
            'expected' => $choice->isExpected(),
        ];

        if ($choice->getFeedback()) {
            $serialized['feedback'] = $choice->getFeedback();
        }

        return $serialized;
    }