cancel method
Cancels a Rollout.
Throws a http.ClientException if there were problems communicating with
the API service. Throws a ServiceException if the API method failed for
any reason.
Implementation
@override
Future<Operation> cancel(CancelRolloutRequest request) async {
if (isClosed) throw StateError('Service is closed');
if (_cancel case final cancel?) {
return cancel(request);
}
throw UnsupportedError('cancel');
}