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

sky/examples/stocks2/lib/stock_row.dart

Index: sky/examples/stocks2/lib/stock_row.dart
diff --git a/sky/examples/stocks2/lib/stock_row.dart b/sky/examples/stocks2/lib/stock_row.dart
index 1ecb06846962e7171176f677dd5d42a7bc3d49a1..fc0555bce72131ab34788224bd9ef536902fa699 100644
--- a/sky/examples/stocks2/lib/stock_row.dart
+++ b/sky/examples/stocks2/lib/stock_row.dart
@@ -3,11 +3,11 @@
 // found in the LICENSE file.
 
 import 'dart:sky' as sky;
-import 'package:sky/framework/components2/ink_well.dart';
-import 'package:sky/framework/fn2.dart';
-import 'package:sky/framework/rendering/flex.dart';
+
 import 'package:sky/framework/rendering/box.dart';
-import 'package:sky/framework/theme/typography.dart' as typography;
+import 'package:sky/framework/widgets/wrappers.dart';
+import 'package:sky/framework/widgets/ink_well.dart';
+
 import 'stock_arrow.dart';
 import 'stock_data.dart';