Metabor\Statemachine\State::addTransition PHP Method

    public function addTransition(TransitionInterface $transition)
    {
        $this->transitions->attach($transition);
        $eventName = $transition->getEventName();
        if ($eventName) {
            $this->getEvent($eventName);
        }
    }

 public function __construct()
 {
     $new = new State(self::STATE_NEW);
     $shipped = new State(self::STATE_SHIPPED);
     $dunning = new State(self::STATE_DUNNING);
     $paid = new State(self::STATE_PAID);
     $closed = new State(self::STATE_CLOSED);
     $returned = new State(self::STATE_RETURNED);
     $returnedAndClosed = new State(self::STATE_RETURNED_AND_CLOSED);
     $event = $new->getEvent(self::EVENT_SHIPPING);
     $command = function (EventInterface $event) {
         list($order, $context) = $event->getInvokeArgs();
         echo 'Command: ' . $order . ' is shipped!' . PHP_EOL;
     };
     $this->addCommand($event, $command);
     $shippingDateGreater14Days = new ShippingDateGreater14Days();
     $new->addTransition(new Transition($shipped, self::EVENT_SHIPPING));
     $shipped->addTransition(new Transition($dunning, null, $shippingDateGreater14Days));
     $shipped->addTransition(new Transition($paid, self::EVENT_PAID));
     $shipped->addTransition(new Transition($returnedAndClosed, self::EVENT_RETURNED));
     $dunning->addTransition(new Transition($returnedAndClosed, self::EVENT_RETURNED));
     $dunning->addTransition(new Transition($closed, self::EVENT_PAID));
     $paid->addTransition(new Transition($closed, null, $shippingDateGreater14Days));
     $paid->addTransition(new Transition($returned, self::EVENT_RETURNED));
     $closed->addTransition(new Transition($returned, self::EVENT_RETURNED));
     $returned->addTransition(new Transition($returnedAndClosed, self::EVENT_REFUND));
     parent::__construct(self::PROCESS_POSTPAYMENT, $new);
 }