anchor.diff:  
   import 'dart:async';
   import 'dart:io';
  -import 'sync_options.dart';
  -import 'load_options.dart';
  +import 'enums/sync_option.dart';
  +import 'enums/load_option.dart';
  +import 'duck_transaction.dart';
   import 'package:logging/logging.dart';
   import 'package:path/path.dart' as path;
   
  
positive.code: 
  
    ///Important: syncs two DIRECTORIES!!!
    Future sync(String remotePath, String localPath, {SyncOptions handleExisting}) async {
      var args = [
        "--synchronize", _url.absolute(remotePath), path.absolute(localPath)
      ];
  
negative.code: 
        if (throttle > 0)
          args..add("--throttle")..add(throttle.toString());
  
        if ()
      }
  
      _log.fine(args.join(" "));
  