NavEntry.kt

val backstack = rememberNavBackStack(NotesList) // Initial screen

NavDisplay(
    backStack = backstack,
    entryProvider = { key ->
        when (key) {
            is NotesList -> NavEntry(key = key) {
                NotesListScreen(
                    // Callback for navigate into Detail screen.
                    navigateToDetail = { route -> 
                        backstack.add(route)
                    }
                )
            }
            is NoteDetail -> NavEntry(key = key) {
                NoteDetailScreen(note = key)
            }
            else -> throw IllegalArgumentException("Unknown key: $key")
        }
    }
)