getParticipants method
Responds with the list of remote participants on a call
Implementation
Future<Either<ScreenMeetError, List<Participant>>> getParticipants() async {
final Map result = await _channel.invokeMethod(_pm.kGetParticipantsCommand);
if (_pm.isSuccess(result)) { return Right(_pm.participants(result[_pm.kParticipants]));}
return Left(_pm.error(result));
}