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tools/dom/templates/html/impl/impl_HTMLTemplateElement.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.
 
 // WARNING: Do not edit - generated code.
 
 part of $LIBRARYNAME;
 
 
 /**
@@ skipping 255 matching lines @@
     // template.
     // TODO(jmesserly): content is DocumentFragment or Element
     var descendents = (content as dynamic).queryAll(_allTemplatesSelectors);
     if (content is Element && (content as Element).isTemplate) {
       _bootstrap(content);
     }
 
     descendents.forEach(_bootstrap);
   }
 
-  static final String _allTemplatesSelectors = 'template, option[template], ' +
+  static final String _allTemplatesSelectors =
+      'template, option[template], optgroup[template], ' +
       Element._TABLE_TAGS.keys.map((k) => "$k[template]").join(", ");
 
   static bool _initStyles;
 
   static void _injectStylesheet() {
     if (_initStyles == true) return;
     _initStyles = true;
 
     var style = new StyleElement();
     style.text = r'''
@@ skipping 13 matching lines @@
     document.head.append(style);
   }
 
   /**
    * A mapping of names to Custom Syntax objects. See [CustomBindingSyntax] for
    * more information.
    */
   @Experimental
   static Map<String, CustomBindingSyntax> syntax = {};
 }