Strong html

tools/dom/templates/html/impl/impl_Storage.darttemplate

 // 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.
 
 part of $LIBRARYNAME;
 
 /**
  * The type used by the
  * [Window.localStorage] and [Window.sessionStorage] properties.
  * Storage is implemented as a Map<String, String>.
@@ skipping 19 matching lines @@
  * section of the library tour.
  */
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS
     implements Map<String, String> {
 
   void addAll(Map<String, String> other) {
     other.forEach((k, v) { this[k] = v; });
   }
 
   // TODO(nweiz): update this when maps support lazy iteration
-  bool containsValue(String value) => values.any((e) => e == value);
+  bool containsValue(Object value) => values.any((e) => e == value);
 
-  bool containsKey(String key) => _getItem(key) != null;
+  bool containsKey(Object key) => _getItem(key) != null;
 
-  String operator [](String key) => _getItem(key);
+  String operator [](Object key) => _getItem(key);
 
   void operator []=(String key, String value) { _setItem(key, value); }
 
   String putIfAbsent(String key, String ifAbsent()) {
     if (!containsKey(key)) this[key] = ifAbsent();
     return this[key];
   }
 
-  String remove(String key) {
+  String remove(Object key) {
     final value = this[key];
     _removeItem(key);
     return value;
   }
 
   void clear() => _clear();
 
   void forEach(void f(String key, String value)) {
     for (var i = 0; true; i++) {
       final key = _key(i);
       if (key == null) return;
 
       f(key, this[key]);
     }
   }
 
   Iterable<String> get keys {
-    final keys = [];
+    final keys = <String>[];
     forEach((k, v) => keys.add(k));
     return keys;
   }
 
   Iterable<String> get values {
-    final values = [];
+    final values = <String>[];
     forEach((k, v) => values.add(v));
     return values;
   }
 
   int get length => _length;
 
   bool get isEmpty => _key(0) == null;
 
   bool get isNotEmpty => !isEmpty;
 $!MEMBERS
 }