protected function getExtraAttributes(array $insertedPKs, Model $currentParent)
    {
        if (!$this->guessedFormatters) {
            return [];
        }

        $extra = array_merge($this->guessedFormatters, $this->customAttributes);

        return $this->evaluateClosureFormatters($extra, $insertedPKs, $currentParent);
    }