Fires whenever the event dictionary in room state is updated.
This does not guarantee that any related objects (like RoomMember) have been updated.
Use RoomStateEvent.Update for that.
Fires whenever a member is added to the members dictionary. The RoomMember
will not be fully populated yet (e.g. no membership state) but will already
be available in the members dictionary.
Fires whenever the event dictionary in room state is updated. This does not guarantee that any related objects (like RoomMember) have been updated. Use RoomStateEvent.Update for that.