@Override
    public void setAmount(BigInteger amount) {
        this.amount = amount.max(BigInteger.ZERO);
        System.out.println("amount of item " + amount);
        if (amount.compareTo(BigInteger.ZERO) == 0) {
            setItemStack(null);
        } else {
            // We must clone the item, otherwise a dupe will occur
            contents[1] = contents[1].clone();
            ItemStack storageItem = contents[1];
            storageItem.setAmount(Math.min(maxStackSize, amount.intValue()));
        }
        Common.runLaterAsync(0, () -> updateInventoryTitle(amount, null));
    }