anchor.diff:  
   
   String getChannels(){
  +try{
   List<Channel> channels =_chat.channels;
   
   String list ='''{"channels":[''';
  
positive.code: list+=''']}''';
  
  return list;
  }
  
  
  
negative.code: }
  }
  
  }Exception catch(e){
  print('Unknown exception: $e');
  return '''{"user":["fail"]}''';
  }
  }
  