anchor.diff:            defaultsTo: false,
             abbr: 'm',
             negatable: false,
  -          help: 'show merged PRs in date range');
  +          help: 'show merged PRs in date range')
  +      ..addFlag("all-contributors",
  +          defaultsTo: false,
  +          abbr: 'a',
  +          negatable: true,
  +          help: 'show all instead of notable contributors');
       try {
         _results = _parser.parse(args);
         if (_results['help']) _printUsage();
  
positive.code:   ArgResults _results;
    bool get showClosed => _results['closed'];
    bool get showMerged => _results['merged'];
    DateTime get from => DateTime.parse(_results.rest[0]);
    DateTime get to => DateTime.parse(_results.rest[1]);
    int get exitCode => _results == null ? -1 : _results['help'] ? 0 : null;
  
negative.code:       sortType: ClusterReportSort.byCount,
        skipEmpty: true,
        showStatistics: false));
    print(
        '\nThere were ${clustersInterestingOwned.keys.length} contributors\n\n');
  }
  