code: public function createNew()
      {
          /** @var \Ekyna\Component\Commerce\Shipment\Model\ShipmentMethodInterface $method */
          $method = parent::createNew();
  
          foreach (ShipmentStates::getNotifiableStates() as $state) {
              $message = new ShipmentMessage();
              $method->addMessage($message->setState($state));
          }
  
          return $method;
      }
docs: {@inheritdoc}