public static void findParentBags (BagRule bag) {
        //List<BagRule> parentBagList = new ArrayList<BagRule>();

        if (BagRule.bagsThatCanHoldBag(bag.getColor(), bag.getAttribute(), bagRuleList).isEmpty()) {
            //System.out.println("FOUND");
            parentBagList.add(bag);
        }

        else {
            for (BagRule bagIterator : BagRule.bagsThatCanHoldBag(bag.getColor(), bag.getAttribute(), bagRuleList)) {
                //System.out.println("FOUND");
                parentBagList.add(bagIterator);
                findParentBags(bagIterator);
            }
        }

    //return parentBagList;
    }