CameraController.cs

// Unity C# reference source
// Copyright (c) Unity Technologies. For terms of use, see
// https://unity3d.com/legal/licenses/Unity_Reference_Only_License

using System;
using UnityEngine;
using System.Collections.Generic;
using UnityEditorInternal;

namespace UnityEditor
{
    abstract class CameraController
    {
        // Actual API to be defined
        // Passing the associated Camera as a parameter should not be needed (only CameraState should be important). See how we can break that dependency when doing the proper refactoring.
        public abstract void Update(CameraState cameraState, Camera cam, EditorWindow window);
    }
}