anchor.diff:        'params': params
       };
       final String jsonEncoded = json.encode(<Map<String, dynamic>>[request]);
  -    debugPrint(jsonEncoded);
  +    _debugPrint(jsonEncoded);
   
       // Set up the response future before we send the request to avoid any
       // races. If the method we're calling is app.stop then we tell waitFor not
  
positive.code:     stderrController.stream.listen(errorBuffer.writeln);
  
      // This is just debug printing to aid running/debugging tests locally.
      stdoutController.stream.listen(debugPrint);
      stderrController.stream.listen(debugPrint);
    }
  
    Future<int> killGracefully() async {
      if (procPid == null) {
        return -1;
      }
      debugPrint('Sending SIGTERM to $procPid..');
      Process.killPid(procPid);
      return proc.exitCode.timeout(quitTimeout, onTimeout: _killForcefully);
    }
  
    Future<int> _killForcefully() {
      debugPrint('Sending SIGKILL to $procPid..');
      Process.killPid(procPid, ProcessSignal.sigkill);
      return proc.exitCode;
    }
  
negative.code:       if (pidFile != null) ...['--pid-file', pidFile.path],
      ];
  
      _debugPrint('Spawning flutter $_args in ${projectFolder.path}');
  
      proc = await Process.start(
        flutterExecutable,
  