This PR was merged into the 4.3 branch.Discussion----------[Security] use LegacyEventDispatcherProxy| Q             | A| ------------- | ---| Branch?       | 4.3| Bug fix?      | yes| New feature?  | no| Deprecations? | no| Tickets       | -| License       | MIT| Doc PR        | -I ran into an issue on one of my apps that has its own event dispatcher class using the old dispatch method signature```phppublic function dispatch($eventName, Event $event = null)```This leads to```TypeError: Argument 2 passed to X\Tests\Base\TestEventDispatcher::dispatch() must be an instance of Symfony\Component\EventDispatcher\Event or null, string given, called in /var/www/x/symfony/vendor/symfony/security/Http/Firewall/ContextListener.php on line 230/var/www/x/symfony/tests/Base/TestEventDispatcher.php:20/var/www/x/symfony/vendor/symfony/security/Http/Firewall/ContextListener.php:230/var/www/x/symfony/vendor/symfony/security/Http/Firewall/ContextListener.php:111```since the event here is dispatched using the new signature:https://github.com/symfony/symfony/blob/4.4/src/Symfony/Component/Security/Http/Firewall/ContextListener.php#L259Commits-------7067e48 [Security] use LegacyEventDispatcherProxy