anchor.diff:        previousErroredPackagesLength = errorPackages.length;
         var duration = new Duration(minutes: 1);
         _logger.info("Waiting for ${duration.inSeconds}s...");
  -      sleep(duration);
  +      await new Future.delayed(duration);
       }
     } catch (error, stackTrace) {
       print(error);
  
positive.code: import 'package:logging/logging.dart';
  import 'package:dartdoc_generator/datastore.dart';
  import 'package:args/args.dart';
  
  main(List<String> args) async {
    try {
  
negative.code:   }
  }
  
  Logger _logger = new Logger("dartdoc_generator");
  