return casted list for videoTracks/audioTracks/subscribedTracks

lib/src/participant/local_participant.dart

@@ -231,6 +231,18 @@ class LocalParticipant extends Participant {
   void updateFromInfo(lk_models.ParticipantInfo info) {
     super.updateFromInfo(info);
   }
+
+  @override
+  List<LocalTrackPublication> get subscribedTracks =>
+      super.subscribedTracks.cast<LocalTrackPublication>().toList();
+
+  @override
+  List<LocalTrackPublication> get videoTracks =>
+      super.videoTracks.cast<LocalTrackPublication>();
+
+  @override
+  List<LocalTrackPublication> get audioTracks =>
+      super.audioTracks.cast<LocalTrackPublication>();
 }
 
 extension LocalParticipantTrackSourceExt on LocalParticipant {

lib/src/participant/participant.dart

@@ -74,8 +74,17 @@ abstract class Participant extends DisposableChangeNotifier
   ConnectionQuality get connectionQuality => _connectionQuality;
 
   /// tracks that are subscribed to
-  List<TrackPublication> get subscribedTracks =>
+  List<TrackPublication> get subscribedTracks => trackPublications.values
-      trackPublications.values.where((e) => e.subscribed).toList();
+      .where((e) => e.subscribed)
+      .toList();
+
+  List<TrackPublication> get videoTracks => trackPublications.values
+      .where((e) => e.kind == lk_models.TrackType.VIDEO)
+      .toList();
+
+  List<TrackPublication> get audioTracks => trackPublications.values
+      .where((e) => e.kind == lk_models.TrackType.AUDIO)
+      .toList();
 
   /// for internal use
   /// {@nodoc}
@@ -178,17 +187,6 @@ abstract class Participant extends DisposableChangeNotifier
   bool operator ==(Object other) => other is Participant && sid == other.sid;
 }
 
-// Convenience extension
-extension ParticipantExt on Participant {
-  List<TrackPublication> get videoTracks => trackPublications.values
-      .where((e) => e.kind == lk_models.TrackType.VIDEO)
-      .toList();
-
-  List<TrackPublication> get audioTracks => trackPublications.values
-      .where((e) => e.kind == lk_models.TrackType.AUDIO)
-      .toList();
-}
-
 extension ParticipantTrackSourceExt on Participant {
   bool isCameraEnabled() {
     return !(getTrackPublicationBySource(TrackSource.camera)?.muted ?? true);

lib/src/participant/remote_participant.dart

@@ -20,6 +20,19 @@ class RemoteParticipant extends Participant {
   final RTCEngine _engine;
   RTCEngine get engine => _engine;
 
+  @override
+  List<RemoteTrackPublication> get subscribedTracks => super.subscribedTracks
+      .cast<RemoteTrackPublication>()
+      .toList();
+
+  @override
+  List<RemoteTrackPublication> get videoTracks =>
+      super.videoTracks.cast<RemoteTrackPublication>();
+
+  @override
+  List<RemoteTrackPublication> get audioTracks =>
+      super.audioTracks.cast<RemoteTrackPublication>();
+
   RemoteParticipant(
     this._engine,
     String sid,