public int getAmount(Player arg0, ItemStack arg1) {
        if (arg1 == null)
            return 0;
        int amount = 0;
        for (int i = 0; i < 36; i++) {
            ItemStack slot = arg0.getInventory().getItem(i);
            if (slot == null || !slot.isSimilar(arg1))
                continue;
            amount += slot.getAmount();
        }
        return amount;
    }