clearSteps method
Requests that the historic steps identified by featuresIds
be cleared from
the persistence layer.
Implementation
@override
Future<void> clearSteps(Iterable<String> featuresIds) async {
final prefs = await SharedPreferences.getInstance();
final mapResult = featuresIds.map<Future>((featureId) async =>
await prefs.remove(_normalizeFeatureId(featureId)));
await Future.wait(mapResult);
}