anchor.diff:  
       log.trace("Writing: ${fileObj.path}");
       // Ensure that the folder structures are in place
  +    // await fileObj.create(recursive: true);
       fileObj.createSync(recursive: true);
  +
  +    // await fileObj.writeAsString(source[sourceName]);
       fileObj.writeAsStringSync(source[sourceName]);
     }
   
  
positive.code:   String startupLocation = path.join(workingPath, ISOLATE_STARTUP_NAME);
    new File(startupLocation).writeAsStringSync(ISOLATE_MAIN_CODE);
  
    if (pubspecPathsToUpdate.length > 0) _pubUpdate(pubspecPathsToUpdate);
  }
  
  _pubUpdate(List<String> pubspecPathsToUpdate) async {
  
negative.code:   if (!workingDirectory.existsSync()) workingDirectory.createSync(recursive: true);
  }
  
  _installSource(Map<String, String> source) async {
    String sha = src_utils.computeCodeSha(source);
    if (_installedSourceSha == sha) {
      log.trace("Sha match, no source changes: $sha");
  