private bool checkIfMinionUpgradableTo(int currentMinionTypeId, Type upgradedMinionType)
        {
            MinionNode tn = TypeIdGenerator.getMinionNodeInst(upgradedMinionType);

            if (tn == null)
            {
                return(false);
            }

            return(tn.checkParent(currentMinionTypeId) != null);
        }