public class BiggerChestBlockEntity extends LootableContainerBlockEntity {
    private DefaultedList<ItemStack> inventory;
    private static final int INVENTORY_SIZE = 54; // 9 * 6 = 54

    public BiggerChestBlockEntity() {
        super(ExampleMod.BIGGER_CHEST_ENTITY_TYPE);
        this.inventory = DefaultedList.ofSize(INVENTORY_SIZE, ItemStack.EMPTY);
    }

    @Override
    protected Text getContainerName() {
        // versions 1.18.2 and below
        return new TranslatableText("container.chest");
        // versions since 1.19
        return Text.translatable("container.chest");
    }

    @Override
    protected ScreenHandler createScreenHandler(int syncId, PlayerInventory playerInventory) {
        return new BiggerChestScreenHandler(syncId, playerInventory, (Inventory) this);
    }

    @Override
    protected DefaultedList<ItemStack> getInvStackList() {
        return this.inventory;
    }

    @Override
    protected void setInvStackList(DefaultedList<ItemStack> list) {
        this.inventory = list;
    }

    @Override
    public int size() {
        return INVENTORY_SIZE;
    }

    @Override
    public void fromTag(CompoundTag tag) {
        super.fromTag(tag);
        this.inventory = DefaultedList.ofSize(this.size(), ItemStack.EMPTY);
        if (!this.deserializeLootTable(tag)) {
            Inventories.fromTag(tag, this.inventory);
        }
    }

    @Override
    public CompoundTag toTag(CompoundTag tag) {
        super.toTag(tag);
        if (!this.serializeLootTable(tag)) {
            Inventories.toTag(tag, this.inventory);
        }
        return tag;
    }
}