Introduce Symfony\Component\Workflow\TransitionInterface ? #19621
I have integrated Workflow component into Drupal 7 website and because of custom config storage it will be really useful for me to have an ability to use my own class as Transition class to have some custom properties and methods.
I usually don't like to add interface on simple POPO / value object.
Then If you store your "workflow schema" outside the config.yml (or something similar in drupal), you have to create everything by hand. It's really easy. So IMHO, there is no need for the TransitionInterface