Hi, I was wondering what are the equivalents to these methods in Angularfire v.7

1. Firestore -createId() method which should create an id for a document to be created in Firestore
2. Messaging -tokenChanges() method which should return an observable emitting the token every time there is a change
3. Messaging -message() method which should return an observable emitting the push notifications from FCM.

I am migrating to v7 from v6 and I was not able to find equivalents for the methods above. Any help finding the new equivalents would be greatly appreciated.