anchor.diff:  String token;
   String outputdir;
   String prefix;
  +String pubserver;
   bool force = false;
   int limit;
   
  
positive.code:   if (result["force"] != null && result["force"] == true) {
      force = true;
    }
  
    if (result["limit"] != null) limit = int.parse(result["limit"]);
    prefix = result["prefix"];
  
negative.code:   parser.addOption("repouser", abbr: "r", help: "Owner of the repositories (defaults to --gituser)");
    parser.addOption("output", abbr: "o", help: "Output directory where to generate the libraries", defaultsTo: "output/");
    parser.addOption("limit", abbr: "l", help: "Limit the number of repositories being generated (for testing)");
    // TODO: Set https://pub.dartlang.org as default, not setting this until tests complete
    parser.addOption("pubserver", help: "Server to use for publishing");
    parser.addOption("prefix", abbr: "p", help: "Prefix for library name", defaultsTo: "google");
    parser.addFlag("force", help: "Force client library update even if no changes", negatable: false);
    parser.addFlag("pub", help: "Publish library to pub", negatable: false);
    parser.addFlag("help", abbr: "h", help: "Display this information and exit", negatable: false);
  
    var result;
  