Document based Apps, how to get access to the Document from within a menu?

I am using the new MultiPlatform SwiftUI Document template in Xcode 12 and I don't understand how to get access to the current FileDocument from within a menu item.

My app code looks like this (straight from the template).

Code Block swift
@main
struct MyApp: App {
var body: some Scene {
DocumentGroup(newDocument: MyDocument()) { file in
ContentView(document: file.$document)
}
.commands {
CommandMenu("Utilities") {
Button(action: {
/*How to get access to the current FileDocument ?*/
}) {
Text("Test")
}
}
}
}
}

Document based Apps, how to get access to the Document from within a menu?
 
 
Q