…ice (StevenRenaux)This PR was merged into the 6.4 branch.Discussion----------[Contracts] Fix `ServiceSubscriberTrait` for nullable service| Q             | A| ------------- | ---| Branch?       | 6.4| Bug fix?      | yes| New feature?  | no| Deprecations? | no| License       | MITUsed in a bundle context.If you use the following example, you will get an exception: `ServiceNotFoundException: The service "twig" in the container provided to "App\Service\Dependency" has a dependency on a non-existent service "Twig\Environment".`The `nullable` argument of the `SubscribedService` attribute is ignored.```php// src/Service/TwigAware.phpnamespace App\Service;use Twig\Environment;use Symfony\Contracts\Service\Attribute\SubscribedService;trait TwigAware{   #[SubscribedService('twig', nullable: true)]    private function twig(): Environment    {         if (!$this->container->has('twig') ) {            throw new \LogicException(\sprintf('Twig is required to use "%s" method. Try to run "composer require symfony/twig-bundle".', __METHOD__));        }        return $environment;    }}// src/Service/MyService.phpnamespace App\Service;use Symfony\Contracts\Service\ServiceSubscriberInterface;use Symfony\Contracts\Service\ServiceSubscriberTrait;class MyService implements ServiceSubscriberInterface{    use ServiceSubscriberTrait, TwigAware;    public function doWithTwig(): void    {        // $this->twig() ...    }}```Related to#60265Commits-------95b0f9b Fix ServiceMethodsSubscriberTrait for nullable service

…le service (StevenRenaux)This PR was merged into the 7.2 branch.Discussion----------[Contracts] Fix `ServiceMethodsSubscriberTrait` for nullable service| Q             | A| ------------- | ---| Branch?       | 7.2| Bug fix?      | yes| New feature?  | no| Deprecations? | no| License       | MITUsed in a bundle context.If you use the following example, you will get an exception: `ServiceNotFoundException: The service "twig" in the container provided to "App\Service\Dependency" has a dependency on a non-existent service "Twig\Environment".`The `nullable` argument of the `SubscribedService` attribute is ignored.```php// src/Service/TwigAware.phpnamespace App\Service;use Twig\Environment;use Symfony\Contracts\Service\Attribute\SubscribedService;trait TwigAware{   #[SubscribedService('twig', nullable: true)]    private function twig(): Environment    {         if (!$this->container->has('twig') ) {            throw new \LogicException(\sprintf('Twig is required to use "%s" method. Try to run "composer require symfony/twig-bundle".', __METHOD__));        }        return $environment;    }}// src/Service/MyService.phpnamespace App\Service;use Symfony\Contracts\Service\ServiceSubscriberInterface;use Symfony\Contracts\Service\ServiceSubscriberTrait;class MyService implements ServiceSubscriberInterface{    use ServiceSubscriberTrait, TwigAware;    public function doWithTwig(): void    {        // $this->twig() ...    }}```Related to#60265Commits-------e67db9a Fix ServiceMethodsSubscriberTrait for nullable service