public function addShipment(ShipmentInterface $shipment)
    {
        if (!$this->shipments->contains($shipment)) {
            $this->shipments->add($shipment);
        }

        return $this;
    }
public function addShipment(ShipmentInterface $shipment)
    {
        if (!$this->shipments->contains($shipment)) {
            $this->shipments->add($shipment);
        }

        return $this;
    }
public function addShipment ( ShipmentInterface $ shipment ) { if ( ! $ this -> shipments -> contains ( $ shipment ) ) { $ this -> shipments -> add ( $ shipment ) ; } return $ this ; }
Adds the shipment.

@param ShipmentInterface $shipment

@return Notify
Adds the shipment .