Deserialization

public static @NotNull Inventory deserializeInventory(byte[] bytes, Player player) throws IOException {

        ByteArrayInputStream is = new ByteArrayInputStream(bytes);
        ObjectInputStream input = new ObjectInputStream(is);

        Inventory backpack = Bukkit.createInventory(player, InventoryType.DISPENSER, Component.text("Backpack"));

        int size = input.readInt();

        for (int i = 0; i < size; i++) {
            int slot = input.readInt();
            int rawSize = input.readInt();
            byte[] rawItem = new byte[rawSize];
            if (input.read(rawItem) == rawSize){
                ItemStack itemStack = ItemStack.deserializeBytes(rawItem);
                backpack.setItem(slot, itemStack);
            }
        }


        return backpack;
    }