FieldRepository::getDefaultCategoryIdResolver

public function getDefaultCategoryIdResolver(int $entityTypeId): callable
{
	return static function () use ($entityTypeId): ?int {
		$factory = Container::getInstance()->getFactory($entityTypeId);

		if ($factory && $factory->isCategoriesSupported())
		{
			return $factory->createDefaultCategoryIfNotExist()->getId();
		}

		return null;
	};
}