Style guide says enum values should be lowerCamelCase.

sky/sdk/lib/framework/components2/input.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 '../editing/editable_string.dart';
 import '../editing/editable_text.dart';
 import '../editing/keyboard.dart';
 import '../fn2.dart';
 import '../theme/colors.dart';
 import '../theme/typography.dart' as typography;
@@ skipping 66 matching lines @@
       children.add(new Container(
           style: _placeholderStyle,
           children: [new Text(placeholder)]
       ));
     }
 
     children.add(new EditableText(value: _editableValue, focused: focused));
 
     return new EventListenerNode(
       new FlexContainer(
-        direction: FlexDirection.Column,
+        direction: FlexDirection.vertical,
         style: _style,
         inlineStyle: focused ? _focusedInlineStyle : null,
         children: children
       ),
       onPointerDown: (sky.Event e) => keyboard.showByRequest()
     );
   }
 }