Make getKeys, getValues getters (keys, values).

pkg/unittest/core_matchers.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.
 
 
 /**
  * Returns a matcher that matches empty strings, maps or collections.
  */
 const Matcher isEmpty = const _Empty();
 
@@ skipping 123 matching lines @@
       if (expected is Iterable && canRecurse) {
         String r = _compareIterables(expected, actual,
           _recursiveMatch, depth+1);
         if (r != null) reason = new StringDescription(r);
       } else if (expected is Map && canRecurse) {
         if (actual is !Map) {
           reason = new StringDescription('expected a map');
         } else if (expected.length != actual.length) {
           reason = new StringDescription('different map lengths');
         } else {
-          for (var key in expected.getKeys()) {
+          for (var key in expected.keys) {
             if (!actual.containsKey(key)) {
               reason = new StringDescription('missing map key ');
               reason.addDescriptionOf(key);
               break;
             }
             reason = _recursiveMatch(expected[key], actual[key],
                 'with key <${key}> ${location}', depth+1);
             if (reason != null) {
               break;
             }
@@ skipping 463 matching lines @@
   final _matcher;
   final String _description;
 
   const _Predicate(this._matcher, this._description);
 
   bool matches(item, MatchState matchState) => _matcher(item);
 
   Description describe(Description description) =>
       description.add(_description);
 }