Service Decoration Attributes

[Haehnchen]

• completion / navigation
• also need to be include inside index, we have related features

// ...
use Symfony\Component\DependencyInjection\Attribute\AsDecorator;

#[AsDecorator(decorates: Mailer::class)]
class LoggingMailer
{
    // ...
}

#[AsDecorator(
    decorates: Mailer::class,
    priority: 10,
    onInvalid: ContainerInterface::IGNORE_ON_INVALID_REFERENCE,
)]
class LoggingMailer
{
    // ...
}