Make getKeys, getValues getters (keys, values).

runtime/lib/immutable_map.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.
 // Immutable map class for compiler generated map literals.
 
 class ImmutableMap<K, V> implements Map<K, V> {
   final _ImmutableArray kvPairs_;
 
   const ImmutableMap._create(_ImmutableArray keyValuePairs)
       : kvPairs_ = keyValuePairs;
@@ skipping 17 matching lines @@
   int get length {
     return kvPairs_.length ~/ 2;
   }
 
   void forEach(void f(K key, V value)) {
     for (int i = 0; i < kvPairs_.length; i += 2) {
       f(kvPairs_[i], kvPairs_[i+1]);
     }
   }
 
-  Collection<K> getKeys() {
+  Collection<K> get keys {
     int numKeys = length;
     List<K> list = new List<K>(numKeys);
     for (int i = 0; i < numKeys; i++) {
       list[i] = kvPairs_[i*2];
     }
     return list;
   }
 
-  Collection<V> getValues() {
+  Collection<V> get values {
     int numValues = length;
     List<V> list = new List<V>(numValues);
     for (int i = 0; i < numValues; i++) {
       list[i] = kvPairs_[i*2 + 1];
     }
     return list;
   }
 
   bool containsKey(K key) {
     for (int i = 0; i < kvPairs_.length; i += 2) {
@@ skipping 27 matching lines @@
 
   V remove(K key) {
     throw new UnsupportedError("Cannot remove from unmodifiable Map");
   }
 
   String toString() {
     return Maps.mapToString(this);
   }
 }