public Item removeItem(String itemName){
        boolean done = false;
        int i = 0;
        while(!done){
            Item current = items.get(i);
            if(current.getName().equalsIgnoreCase(itemName)){
                items.remove(i);
                currentWeight -= current.getWeight();
                return current;
            }
            i++;
            if(i >= items.size()){
                done = true;
            }
        }
        return null;
    }