Defining the ARKitComponent

We start by adding a private field to an ARKitComponent that will be initialized later on. Let's set this up by going through the following steps:

1. In the WhackABox.iOS project, open Game.cs.
2. Add a private field that holds an ARKitComponent, as shown in bold in the following code block:

using System.Linq;
using ARKit;
using Urho;
using Urho.iOS;

namespace WhackABox.iOS
{
    public class Game : WhackABox.Game
    {
        protected ARKitComponent arkitComponent;

        public Game(ApplicationOptions options) : base(options)
        {
        }
    }
}

Make sure that you add all the using statements to ensure that all the code we later use resolves the correct types.