track<T> method

@override T track<T>(T action())

Implementation

@override
T track<T>(T Function() action) {
  if (isStarted) {
    throw StateError('Can not be tracked twice');
  }
  _tracking = true;
  final result = runZoned(action,
      zoneSpecification: asyncTimeTrackerZoneSpecification,
      zoneValues: {_zoneKey: this});
  if (result is Future) {
    return result
        // Break possible sync processing of future completion, so slice trackers can be finished
        .whenComplete(() => Future.value())
        .whenComplete(() => _tracking = false) as T;
  } else {
    _tracking = false;
    return result;
  }
}