public void addNeededGood(Stock.StockType s)
	{
		if(! warehouse.neededGoods.containsKey(s))
		{
			Stock stock = new Stock(s);
			//stock.addVolume(10);
			//warehouse.usedSpace += s.getThickness()*10;
			//warehouse.availableSpace = Warehouse.capacity - warehouse.usedSpace;
			warehouse.neededGoods.put(s,  stock);
		}
	}