/**
* {@inheritdoc}
*
* @throws InvalidEventException
*
* @since Method available since Release 2.2.0
*/
public function addTransitionEvent(TransitionEventInterface $event)
{
if ($event->getEventId() != EventInterface::EVENT_START) {
throw new InvalidEventException(sprintf('The transition event for the state "%s" should be "%s", "%s" is specified.', $this->getStateId(), EventInterface::EVENT_START, $event->getEventId()));
}
parent::addTransitionEvent($event);
}
