protected function getNestedReferenceFieldOptionData(array $options, $modelClass)
    {
        $data = array_get($options, 'models.' . $modelClass, false);

        if (false === $data || ! is_array($data)) {
            // If we could not retrieve the model data by key,
            // it was either omitted are set as a string value (non-assiative).
            // In either case, there is no specified reference data.

            return [];
        }

        return $data;
    }