work in progress: observable implementation using detailed change records

lib/web_ui.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 library exposes the types in [watcher], [safe_html], [templating] and
- * the [WebComponent] base class. See this article for more information about
- * this library: <http://www.dartlang.org/articles/dart-web-components/>.
+ * This library exposes the types in [observe], [safe_html], [templating],
+ * [watcher] and the [WebComponent] base class. See this article for more
+ * information about this library:
+ * <http://www.dartlang.org/articles/dart-web-components/>.
  */
 library web_ui;
 
-export 'watcher.dart';
+export 'observe.dart';
 export 'safe_html.dart';
 export 'templating.dart';
+export 'watcher.dart';
 
 import 'dart:async';
 import 'dart:html';
 
 import 'package:meta/meta.dart';
 
 // Imported for the doc comment
-import 'watcher.dart' as watcher;
+import 'observe.dart' as observe;
 import 'safe_html.dart' as safe_html;
 import 'templating.dart' as templating;
+import 'watcher.dart' as watcher;
 
 /**
  * The base class for all Dart web components. In addition to the [Element]
  * interface, it also provides lifecycle methods:
  * - [created]
  * - [inserted]
  * - [attributeChanged]
  * - [removed]
  */
 abstract class WebComponent implements Element {
@@ skipping 602 matching lines @@
 }
 
 /**
  * Set this to true to use native Shadow DOM if it is supported.
  * Note that this will change behavior of [WebComponent] APIs for tree
  * traversal.
  */
 bool useShadowDom = false;
 
 bool get _realShadowRoot => useShadowDom && ShadowRoot.supported;