protected function mergeAttributes(Model $model)
    {
        $factoryAttributes = $this->getFactoryAttributes($model);

        $isTranslation = $this->isTranslation($model);

        return array_merge(
            $isTranslation ? $this->guessedTranslationFormatters : $this->guessedFormatters,
            $factoryAttributes,
            $isTranslation ? $this->customTranslatableAttributes : $this->customAttributes
        );
    }