//XXX: revert to underscore because of that shit:
//XXX: see https://symfony.com/doc/current/components/config/definition.html#normalization
//XXX: see https://github.com/symfony/symfony/issues/7405
//XXX: revert to underscore because of that shit:
//XXX: see https://symfony.com/doc/current/components/config/definition.html#normalization
//XXX: see https://github.com/symfony/symfony/issues/7405