Shipment/EventListener/AbstractShipmentListener.php
public function onPreCreate(ResourceEventInterface $event)
    {
        $shipment = $this->getShipmentFromEvent($event);

        $this->preLoadSale($shipment->getSale());
    }
public function onPreCreate(ResourceEventInterface $event)
    {
        $shipment = $this->getShipmentFromEvent($event);

        $this->preLoadSale($shipment->getSale());
    }
Pre create event handler.

@param ResourceEventInterface $event