Cannot inject AppDelegate to SwiftUI macos app - swift

Question

I'm new to swift development and stuck developing sattus bar application. Found some good toturials (first, second, third, fourth), and in eash of them at some point authors inject AppDelegate to : App class, kinda:
import SwiftUI
#main
struct CaptureOneAppApp: App {
#UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
var body: some Scene {
WindowGroup {
ContentView()
}
}
}
And in tutorials similar code works just fine, but me getting compile-time error pointing row #5:
Type annotation missing in pattern
As I understand, compiler asks me to add some suffix with type definition, but i have no idea how it should look like and actually not sure if this is a correct way to solve the problem. So, what I'm doing wrong?
UPD AppDelegate.swift code:
import Cocoa
import SwiftUI
#NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
var window: NSWindow!
var statusBar: StatusBarController?
func applicationDidFinishLaunching(_ aNotification: Notification) {
// Create the SwiftUI view that provides the window contents.
let contentView = ContentView()
// Create the window and set the content view.
window = NSWindow(
contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
window.center()
window.setFrameAutosaveName("Main Window")
window.contentView = NSHostingView(rootView: contentView)
window.makeKeyAndOrderFront(nil)
//Initialising the status bar
statusBar = StatusBarController.init()
}
func applicationWillTerminate(_ aNotification: Notification) {
// Insert code here to tear down your application
}
}
it's just copypasted from first