Listing 28.12 generates error

Android Programming (4th Edition) 28. Broadcast Intents
1

Hello,

I was following the book with code and after my result receiver implementation shown in Listing 28.12

class NotificationReceiver: BroadcastReceiver() {

    override fun onReceive(context: Context, intent: Intent) {
        Log.i(TAG, "received result: $resultCode")
        if (resultCode != Activity.RESULT_OK) {
            //A foreground activity canceled the broadcast
            return
        }

        val requestCode = intent.getIntExtra(PollWorker.REQUEST_CODE, 0)
        val notification: Notification =
            intent.getParcelableExtra(PollWorker.NOTIFICATION)

        val notificationManager = NotificationManagerCompat.from(context)
        notificationManager.notify(requestCode, notification)
    }

    companion object {
        private const val TAG = "NotificationReceiver"
    }
}

I am getting an error:

Type mismatch: inferred type is Notification? but Notification was expected

It is linked to this line:

val notification: Notification =
            intent.getParcelableExtra(PollWorker.NOTIFICATION)

Should I use the double exclamation mark there?

Note:
In PollWorker.kt const val NOTIFICATION is the same as shown in listing 28.11:

        const val NOTIFICATION = "NOTIFICATION"