public ArrayList<String> getItemTypeRequirements(String n) {
        ArrayList<String> requirements = new ArrayList<String>();
        
        if(itemTypes.containsKey(n)) {
            ItemType it = (ItemType) itemTypes.get(n);
            if(it != null) {
                requirements = it.getRequirementString();
            }
        }
        
        return requirements;
    }