final ItemStack upgrade = new ItemBuilder(Material.valueOf(ItemsFile.getConfig().getString("items.upgrade.item")), ItemsFile.getConfig().getInt("items.upgrade.data")).setName(ItemsFile.getConfig().getString("items.upgrade.name").replace("%level%", String.valueOf(level + 1))).setLore(l3).getStack();
        final ItemStack upgrade_not_available = new ItemBuilder(Material.valueOf(ItemsFile.getConfig().getString("items.upgrade_not_available.item")), ItemsFile.getConfig().getInt("items.upgrade_not_available.data")).setName(ItemsFile.getConfig().getString("items.upgrade_not_available.name").replace("%level%", "1")).setLore(ItemsFile.getConfig().getStringList("items.upgrade_not_available.lore")).getStack();
        final ItemStack upgrade_already_purchased = new ItemBuilder(Material.valueOf(ItemsFile.getConfig().getString("items.upgrade_already_purchased.item")), ItemsFile.getConfig().getInt("items.upgrade_already_purchased.data")).setName(ItemsFile.getConfig().getString("items.upgrade_already_purchased.name")).setLore(ItemsFile.getConfig().getStringList("items.upgrade_already_purchased.lore")).getStack();
        switch(level) {
            case 0:
                i.setItem(11, upgrade);
                i.setItem(12, upgrade_not_available);
                i.setItem(13, upgrade_not_available);
                i.setItem(14, upgrade_not_available);
                i.setItem(15, upgrade_not_available);
                break;
            case 1:
                i.setItem(11, upgrade_already_purchased);
                i.setItem(12, upgrade);
                i.setItem(13, upgrade_not_available);
                i.setItem(14, upgrade_not_available);
                i.setItem(15, upgrade_not_available);
                break;
            case 2:
                i.setItem(11, upgrade_already_purchased);
                i.setItem(12, upgrade_already_purchased);
                i.setItem(13, upgrade);
                i.setItem(14, upgrade_not_available);
                i.setItem(15, upgrade_not_available);
                break;
            case 3:
                i.setItem(11, upgrade_already_purchased);
                i.setItem(12, upgrade_already_purchased);
                i.setItem(13, upgrade_already_purchased);
                i.setItem(14, upgrade);
                i.setItem(15, upgrade_not_available);
                break;
            case 4:
                i.setItem(11, upgrade_already_purchased);
                i.setItem(12, upgrade_already_purchased);
                i.setItem(13, upgrade_already_purchased);
                i.setItem(14, upgrade_already_purchased);
                i.setItem(15, upgrade);
                break;
            case 5:
                i.setItem(11, upgrade_already_purchased);
                i.setItem(12, upgrade_already_purchased);
                i.setItem(13, upgrade_already_purchased);
                i.setItem(14, upgrade_already_purchased);
                i.setItem(15, upgrade_already_purchased);
                break;
            default:
                return;
        }