Remove Streams from CombineLatestStream - RxDart

I am using:

• Provider Package - StreamProvider
• RxDart package - CombineLatestStream
• Firebase Realtime Database - onValue Stream

Code Functionality

1. I get all my FrediUserGroup data from a provider declared at the beginning of the app.

 var userGroups = Provider.of<List<FrediUserGroup>?>(context);
 FrediUserGroup group = userGroups![widget.groupIndex]; 

2. I use the group.participantsIds property, that is constantly updated if some id is added/deleted from the database, as an argument for the stream in question:

    StreamBuilder(
        stream: getGroupParticipantsDB(group.participantsIds),
        builder: (BuildContext context, AsyncSnapshot<dynamic> 
            participantDataSnapshot) {
            return MyWidgets() //any widget to display data
        });

3. Using rxDart, the data from those participants is loaded into a CombineLatestStream

 Stream<List<FrediUser>>? getGroupParticipantsDB(List<String>? participantIds) {
    List<Stream<FrediUser>> streams = [];
    
    participantIds?.forEach((id) {
       var streamToAdd = dbQuery(2, 'users', id).onValue.map((event) => 
       FrediUser.fromMap(event.snapshot.value as Map));
       streams.add(streamToAdd);
    });
    
    return CombineLatestStream.list(streams);}

Problem

• When I delete all participants in the database, group.participantIds is changed and updated to empty [].
• The streambuilder gets called again, and the stream getGroupParticipantsDB(group.participantsIds) gets called again.
• However, the CombineLatestStream still has the old streams (old participants that are now deleted, which don't even appear in the group.participantIds), eventhough the streams list is empty this time around.

Question

How can I delete/reset the CombineLatestStream before calling CombineLatestStream.list(streams) again? Because it is storing the old streams which I no longer need. As it is an immutable list, I cannot clear() it.

According to the docs rxdart

https://pub.dev/documentation/rxdart/latest/rx/CombineLatestStream-class.html

If the provided streams is empty, the resulting sequence completes immediately without emitting any items and without any calls to the combiner function.

and according to the docs of flutter

https://api.flutter.dev/flutter/widgets/StreamBuilder-class.html

The data and error fields of snapshots produced are only changed when the state is ConnectionState.active.

I assume that when you have an empty list of id, CombineLatestStream has an empty list of streams and closes the stream immediately. Since the stream is closed, StreamBuilder doesn't provider new data.

To rerender your widget with empty array of users try to use a condition like this:

if (ids.isEmpty) {
  return Stream.value([]);
}