monitoring method
Implementation
@override
Stream<MonitoringResult> monitoring(List<Region> regions) {
final list = regions.map((region) => region.toJson).toList();
final Stream<MonitoringResult> onMonitoring = _monitoringChannel
.receiveBroadcastStream(list)
.map((dynamic event) => MonitoringResult.from(event));
return onMonitoring;
}