public static List<BagRule> bagsThatCanHoldBag(String sentColor, String sentAttribute, List<BagRule> sentList) {
        List<BagRule> list = new ArrayList<>();

        for (BagRule bag : sentList) {
            BidiMap<String, String> map = bag.getContentsColorAttributeMap();
            String color = map.getKey(sentAttribute);
            String attr = null;

            if (color != null) {
                attr = map.get(color);
            }

            if (color == null || attr == null) {
                continue;
            } else if (!color.equals(sentColor) || !attr.equals(sentAttribute)) {
                continue;
            } else {
                list.add(bag);
            }
        }

        return list;
    }