anchor.diff:      try {
         await devFS.flush();
       } catch (error) {
  -      printError('Error sending DevFS files: $error');
  +      printError('Error sending sources to the client device: $error');
       }
     }
   
  
positive.code: 
    List<File> _dartFiles(List<FileSystemEntity> entities) {
      return new List<File>.from(entities
        .where((FileSystemEntity entity) => entity is File)
        .where((File file) => file.path.endsWith('.dart')));
    }
  
    void _printHelp() {
  
negative.code:           _sendFiles(
              directory,
              'packages/$packageName',
              _dartFiles(directory.listSync(recursive: true))
            );
          }
        }
  