Don't check for Member.

utils/apidoc/html_diff.dart

 // Copyright (c) 2011, 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.
 
 /**
  * A script to assist in documenting the difference between the dart:html API
  * and the old DOM API.
  */
 #library('html_diff');
 
@@ skipping 149 matching lines @@
     var htmlType = htmlImplToHtmlType(implMember.declaringType);
     if (htmlType == null) return null;
 
     bool getter, setter;
     if (implMember.isConstructor || implMember.isFactory) {
       var constructor = htmlType.constructors[implMember.name];
       if (constructor != null) return constructor;
       return htmlType.factories[implMember.name];
     } else if ((getter = implMember.name.startsWith('get:')) ||
         (setter = implMember.name.startsWith('set:'))) {
-      // Use getMember to follow interface inheritance chains. If it's a
-      // Member, though, it's an implementation of some data structure
-      // and we don't care about it.
+      // Use getMember to follow interface inheritance chains.
       var htmlProperty = htmlType.getMember(implMember.name.substring(4));
-      if (htmlProperty != null && htmlProperty is! Member) {
+      if (htmlProperty != null) {
         return getter ? htmlProperty.getter : htmlProperty.setter;
       } else {
         return null;
       }
     } else {
       return htmlType.getMember(implMember.name);
     }
   }
 
   /**
@@ skipping 208 matching lines @@
   Map<String, String> _getTags(String comment) {
     if (comment == null) return const <String>{};
     final re = new RegExp("@([a-zA-Z]+) ([^;]+)(?:;|\$)");
     final tags = <String>{};
     for (var m in re.allMatches(comment.trim())) {
       tags[m[1]] = m[2];
     }
     return tags;
   }
 }