Named Events
The emitter accepts strings as events, which will be converted to a Event instance.
<?php
use League\Event\Event;
$emitter->addListener('string.event.name', function (Event $event) {
echo $event->getName(); // echo's "string.event.name"
});
$emitter->emit('string.event.name');
// OR even better:
$emitter->emit(Event::named('string.event.name'));