public function build()
    {
        $config = parent::build();
        if (array_key_exists('collapsed', $config)) {
            $fieldKey = $this->fieldsBuilder->getField($config['collapsed'])->getKey();
            $fieldKey = preg_replace('/^field_/', '', $fieldKey);
            $config['collapsed'] = $this->getName() . '_' . $fieldKey;
        }
        return $config;
    }