/**
* Returns the next ItemToShip that needs to be processed. Removes the item from the ShipmentQueue
* and adds it to the ShipmentProcessStation.
*
* @return ItemToShip item to be processed next.
*/
public ItemToShip processNext() {
if (queueFromFactory == null) {
throw new NoSuchElementException();
}
ItemToShip item = queueFromFactory.remove();
item.getInLine(station);
return item;
}
