Style guide says enum values should be lowerCamelCase.

sky/examples/stocks2/lib/stock_app.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'package:sky/framework/components2/tool_bar.dart';
 import 'package:sky/framework/components2/drawer.dart';
 // import 'package:sky/framework/components2/drawer_header.dart';
 // import 'package:sky/framework/components2/floating_action_button.dart';
 // import 'package:sky/framework/components2/icon.dart';
 import 'package:sky/framework/components2/icon_button.dart';
 // import 'package:sky/framework/components2/input.dart';
 // import 'package:sky/framework/components2/menu_divider.dart';
 import 'package:sky/framework/components2/menu_item.dart';
 // import 'package:sky/framework/components2/modal_overlay.dart';
 // import 'package:sky/framework/components2/popup_menu.dart';
 // import 'package:sky/framework/components2/radio.dart';
 import 'package:sky/framework/components2/scaffold.dart';
 import 'package:sky/framework/fn2.dart';
 import 'package:sky/framework/theme2/typography.dart' as typography;
 import 'package:sky/framework/theme2/colors.dart' as colors;
 import 'stock_data.dart';
 import 'package:sky/framework/rendering/box.dart';
 // import 'stock_list.dart';
 // import 'stock_menu.dart';
 
 import 'dart:async';
 import 'dart:sky' as sky;
 
-enum StockMode { Optimistic, Pessimistic }
+enum StockMode { optimistic, pessimistic }
 
 class StocksApp extends App {
 
   // static final Style _searchBarStyle = new Style('''
   //   background-color: ${Grey[50]};''');
 
   // static final Style _titleStyle = new Style('''
   //   ${typography.white.title};''');
 
   List<Stock> _stocks = [];
@@ skipping 59 matching lines @@
     });
   }
 
   bool _autorefresh = false;
   void _handleAutorefreshChanged(bool value) {
     setState(() {
       _autorefresh = value;
     });
   }
 
-  StockMode _stockMode = StockMode.Optimistic;
+  StockMode _stockMode = StockMode.optimistic;
   void _handleStockModeChange(StockMode value) {
     setState(() {
       _stockMode = value;
     });
   }
 
   // static FlexBoxParentData _flex1 = new FlexBoxParentData()..flex = 1;
 
   Drawer buildDrawer() {
     return new Drawer(
       controller: _drawerController,
       level: 3,
       children: [
         // new DrawerHeader(children: [new Text('Stocks')]),
         new MenuItem(
           key: 'Stock list',
           icon: 'action/assessment',
           children: [new Text('Stock List')]),
         new MenuItem(
           key: 'Account Balance',
           icon: 'action/account_balance',
           children: [new Text('Account Balance')]),
         // new MenuDivider(key: 'div1'),
         // new MenuItem(
         //   key: 'Optimistic Menu Item',
         //   icon: 'action/thumb_up',
-        //   onGestureTap: (event) => _handleStockModeChange(StockMode.Optimistic),
+        //   onGestureTap: (event) => _handleStockModeChange(StockMode.optimistic),
         //   children: [
         //     new ParentDataNode(new Text('Optimistic'), _flex1),
-        //     new Radio(key: 'optimistic-radio', value: StockMode.Optimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
+        //     new Radio(key: 'optimistic-radio', value: StockMode.optimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
         //   ]),
         // new MenuItem(
         //   key: 'Pessimistic Menu Item',
         //   icon: 'action/thumb_down',
-        //   onGestureTap: (event) => _handleStockModeChange(StockMode.Pessimistic),
+        //   onGestureTap: (event) => _handleStockModeChange(StockMode.pessimistic),
         //   children: [
         //     new ParentDataNode(new Text('Pessimistic'), _flex1),
-        //     new Radio(key: 'pessimistic-radio', value: StockMode.Pessimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
+        //     new Radio(key: 'pessimistic-radio', value: StockMode.pessimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
         //   ]),
         // new MenuDivider(key: 'div2'),
         new MenuItem(
           key: 'Settings',
           icon: 'action/settings',
           children: [new Text('Settings')]),
         new MenuItem(
           key: 'Help & Feedback',
           icon: 'action/help',
           children: [new Text('Help & Feedback')])
@@ skipping 58 matching lines @@
     ];
     addMenuToOverlays(overlays);
     return new StackContainer(children: overlays);
   }
 }
 
 void main() {
   print("starting stocks app!");
   new StocksApp();
 }