XcodeGen/Tests/Fixtures/TestProject/App_macOS/ViewController.swift

import Cocoa

class ViewController: NSViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override var representedObject: Any? {
        didSet {
            // Update the view, if already loaded.
        }
    }
}