Make getKeys, getValues getters (keys, values).

utils/pub/yaml/model.dart

 // Copyright (c) 2012, 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.
 
 // This file contains the node classes for the internal representations of YAML
 // documents. These nodes are used for both the serialization tree and the
 // representation graph.
 
 /** A tag that indicates the type of a YAML node. */
 class _Tag {
@@ skipping 201 matching lines @@
   Map<_Node, _Node> content;
 
   _MappingNode(String tagName, this.content)
     : super(new _Tag.mapping(tagName));
 
   /** Two mappings are equal if their tags and contents are equal. */
   bool operator ==(other) {
     // Should be super != other; bug 2554
     if (!(super == other) || other is! _MappingNode) return false;
     if (content.length != other.content.length) return false;
-    for (var key in content.getKeys()) {
+    for (var key in content.keys) {
       if (!other.content.containsKey(key)) return false;
       if (content[key] != other.content[key]) return false;
     }
     return true;
   }
 
   String toString() {
-    var strContent = Strings.join(content.getKeys().
+    var strContent = Strings.join(content.keys.
         map((k) => '${k}: ${content[k]}'), ', ');
     return '$tag {$strContent}';
   }
 
   int get hashCode => super.hashCode ^ _hashCode(content);
 
   visit(_Visitor v) => v.visitMapping(this);
 }