Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/TreeWalker.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 interface TreeWalker {
 
-  Node get currentNode();
+  Node currentNode;
 
-  void set currentNode(Node value);
+  final bool expandEntityReferences;
 
-  bool get expandEntityReferences();
+  final NodeFilter filter;
 
-  NodeFilter get filter();
+  final Node root;
 
-  Node get root();
-
-  int get whatToShow();
+  final int whatToShow;
 
   Node firstChild();
 
   Node lastChild();
 
   Node nextNode();
 
   Node nextSibling();
 
   Node parentNode();
 
   Node previousNode();
 
   Node previousSibling();
 }