public boolean canHop(Inventory i, ItemStack item, int hop) {
        if (i.firstEmpty() != -1) {
            return true;
        }
        boolean can = false;
        for (ItemStack it : i.getContents()) {
            if (it == null) {
                can = true;
                break;
            } else {
                if (it.isSimilar(item)) {
                    if ((it.getAmount() + hop) <= it.getMaxStackSize()) {
                        can = true;
                        break;
                    }
                }
            }
        }
        return can;
    }