Refactor fn2.dart, since it breached our 1000-line threshold.

sky/examples/stocks2/lib/stock_list.dart

Index: sky/examples/stocks2/lib/stock_list.dart
diff --git a/sky/examples/stocks2/lib/stock_list.dart b/sky/examples/stocks2/lib/stock_list.dart
index 7ff6fe8cb75f4d4809cee722c800992885b3fa7f..1c3ac12a026fa5293a6aaa4be0dd47c15c47ec86 100644
--- a/sky/examples/stocks2/lib/stock_list.dart
+++ b/sky/examples/stocks2/lib/stock_list.dart
@@ -2,8 +2,9 @@
 // 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/fixed_height_scrollable.dart';
-import 'package:sky/framework/fn2.dart';
+import 'package:sky/framework/widgets/fixed_height_scrollable.dart';
+import 'package:sky/framework/widgets/wrappers.dart';
+
 import 'stock_data.dart';
 import 'stock_row.dart';