Implementing the Adapter pattern

To start off, we will implement a placeholder class that will mock the third-party inventory system as presented in the scenario of the previous section:

1. The InventorySystem class provided by our fictional provider has three methods, AddItem(), RemoveItem(), and GetInventory(). All of these methods are hardcoded to use cloud storage and we can't modify them:

using UnityEngine;
using System.Collections.Generic;

namespace Chapter.Adapter
{
    public class InventorySystem
    {
        public void AddItem(InventoryItem item)
        {
            Debug.Log(
                "Adding item to the cloud");
        }

        public void RemoveItem(InventoryItem item)
        {
            Debug.Log(
                "Removing item from the cloud");
        }

        public List<InventoryItem> GetInventory()
        {
            Debug.Log(
                "Returning an inventory list stored in the cloud");

            return new List<InventoryItem...