anchor.diff:      final topThreshold =
           top == 0 ? 0.0 : 1.0 - (top + 1) * (1.0 / popularityStorage.count);
   
  +    final now = new DateTime.now().toUtc();
       await for (Package p in dbService.query<Package>().run()) {
         totalCount++;
         if (totalCount % 25 == 0) {
  
positive.code:     },
      'packagesToNotify': packagesToNotify,
      'authorsToNotify': authorsToNotify.toList()..sort(),
    };
    final String json = new JsonEncoder.withIndent('  ').convert(report);
    if (argv['output'] != null) {
  
negative.code:   int onlyDart2Count = 0;
    final packagesToNotify = <String>[];
    final authorsToNotify = new Set<String>();
    final onlyDart2Packages = <String>[];
  
    await withProdServices(() async {
      final bucket =
  