anchor.diff:  
     _childOfItemByKey(item, key) {
       return (item is Iterable)
  -    ? item[int.parse(key)]
  -    : item[key];
  +        ? item[int.parse(key)]
  +        : item[key];
     }
   
     String toString() {
  
positive.code:   static _loadEnv() {
      try {
        dotenv.load();
      } on FileSystemException {
      }
      _envHasBeenLoaded = true;
    }
  
  
negative.code: 
    String _makePathOfFile(File file, Directory root) {
      return file.path
          .replaceAll(new RegExp('^${root.path}\\${Platform.pathSeparator}'), '')
          .replaceAll(new RegExp(r'.yaml$'), '')
          .replaceAll('/', '.');
    }
  
    Future<dynamic> _loadYaml(File file) async {
  