Issue #3161983 by Pooja Ganjage, sanjayk, catch, longwave, daffie, dww, Gábor Hojtsy: [Symfony 6] Update EventDispatcherInterface type hints in constructors
@trigger_error('Calling the Symfony\Component\EventDispatcher\EventDispatcherInterface::dispatch() method with a string event name as the first argument is deprecated in drupal:9.1.0, an Event object will be required instead in drupal:10.0.0. See https://www.drupal.org/node/3154407',E_USER_DEPRECATED);
@trigger_error('Calling the Symfony\Contracts\EventDispatcher\EventDispatcherInterface::dispatch() method with a string event name as the first argument is deprecated in drupal:9.1.0, an Event object will be required instead in drupal:10.0.0. See https://www.drupal.org/node/3154407',E_USER_DEPRECATED);