anchor.diff:      }
     }
   
  -  Future<Null> _scheduleWrite(String devicePath,
  -                              DevFSContent content,
  -                              DevFSProgressReporter progressReporter) async {
  +  Future<Null> _scheduleWrite(
  +    String devicePath,
  +    DevFSContent content,
  +    DevFSProgressReporter progressReporter, [
  +    int retry = 0,
  +  ]) async {
       try {
         HttpClientRequest request = await _client.putUrl(httpAddress);
         request.headers.removeAll(HttpHeaders.ACCEPT_ENCODING);
  
positive.code:       HttpClientResponse response = await request.close();
        await response.drain<Null>();
      } catch (e) {
        printError('Error writing "$devicePath" to DevFS: $e');
      }
      if (progressReporter != null) {
        _done++;
  
negative.code:   final Uri httpAddress;
  
    static const int kMaxInFlight = 6;
    static const int kMaxRetries = 3;
  
    int _inFlight = 0;
    Map<String, DevFSContent> _outstanding;
  