OK thanks, so I did something like:

suspend fun observeUsersChanged() {
 val firebaseFirestore : FirebaseFirestore = Firebase.firestore(Firebase.app)
 val usersCollection = firebaseFirestore.collection("Users")
 usersCollection.snapshots.collect {
 querySnapshot ->
 val documents = querySnapshot.documents
 // TODO: get list of my own 'User' object instead of list of DocumentSnapshot
 }
}

How can I get a list of my own 'User' object?

I know about data() method of document..but can I get list instead of use for each?

@nbransby

Im not sure how to do it generally because I'm start with firebase with your library...
I can try to explain what I am trying to implement.

I want to create a basic chat application:
Android app - Recycler view for the messages list
Kotlin multiplatform library for common chat code - here I want to implement the communication with Firestore (based your SDK).

So if I already have (for example) 100 messages in my chat..
I am sending a new message and I get 101 documents instead of only 1 new document..

the code for listening is:

override fun observeOnMessagesChanged() {
 CoroutineScope(GlobalScope.coroutineContext).launch {
 messagesCollection.snapshots.collect { querySnapshot ->
 querySnapshot.documents.forEach { documentSnapshot ->
 val message = documentSnapshot.data<Message>()
 }
 }
 }
 }

looks like you need docChanges() which we havent exposed yet https://firebase.google.com/docs/firestore/query-data/listen?authuser=0#view_changes_between_snapshots

You can create a feature request or even help us add it by creating a PR!

OK I have opened a feature request here: #122
Hope to find a time to help you too sometimes

Thanks!