navigateBackWithResult.kt

fun navigateBackWithResult(result: Bundle) {
  val childFragmentManager = supportFragmentManager.findFragmentById(R.id.nav_host_fragment)?.childFragmentManager
  var backStackListener: FragmentManager.OnBackStackChangedListener by Delegates.notNull()
  backStackListener = FragmentManager.OnBackStackChangedListener {
    (childFragmentManager?.fragments?.get(0) as NavigationResult).onNavigationResult(result)
    childFragmentManager.removeOnBackStackChangedListener(backStackListener)
  }
  childFragmentManager?.addOnBackStackChangedListener(backStackListener)
  navController().popBackStack()
}