anchor.diff:    final Map<String, dynamic> _json;
     final String _name;
     final String _version;
  +  final String _etag;
   
     final String _shortName;
     final String _gitName;
  
positive.code: 
        writeFile("$mainFolder/CONTRIBUTORS", _createContributors());
  
        writeFile("$mainFolder/VERSION", _json["etag"]);
      }
  
      // Create common library files
  
negative.code:     var json = JSON.parse(data);
      String name = json["name"];
      String version = json["version"];
      String etag = json["etag"];
  
      return new Generator.core(json, name, version, prefix, etag);
    }
  
    Generator.core(this._json, String name, String version, this._prefix, this._etag) :
      _name = name,
      _version = version,
      _shortName = cleanName("${name}_${version}").toLowerCase(),
  