anchor.diff:  
   import 'dart:io';
   import 'dart:async';
  +import 'dart:convert';
   import 'package:path/path.dart' as path;
   
   class AnalyzerConfig {
  
positive.code: class Analyzer {
    final AnalyzerConfig config;
  
    ProcessResult _process;
  
    Analyzer(this.config);
  
    bool get isRunning => _process != null;
  
    Future<Null> start() async {
      if(isRunning) {
        throw new Exception("Analyzer already running!");
      }
      _process = await _createProcess(config);
  
      //TODO connect writer and reader
    }
  
    /// Restarts, or starts, the analysis server process.
  
negative.code: 
      arguments.add('--client-id=icu');
  
      return Process.start(config.dartVMPath, arguments);
    }
  }
  