[Effen] add StyleNode

sky/examples/stocks-fn/lib/stock_app.dart

Index: sky/examples/stocks-fn/lib/stock_app.dart
diff --git a/sky/examples/stocks-fn/lib/stock_app.dart b/sky/examples/stocks-fn/lib/stock_app.dart
index f79c26ad182c8e9b01c9d78b7df51b3d43e68aa9..87f5e6dca7706b6947b6b880276559e4e569a808 100644
--- a/sky/examples/stocks-fn/lib/stock_app.dart
+++ b/sky/examples/stocks-fn/lib/stock_app.dart
@@ -40,6 +40,10 @@ class StocksApp extends App {
     ${typography.white.title};'''
   );
 
+  static Style _stocklistHeight = new Style('''
+    flex: 1;'''
+  );
+
   List<Stock> _sortedStocks;
   bool _isSearching = false;
   bool _isShowingMenu = false;
@@ -137,7 +141,9 @@ class StocksApp extends App {
       ]
     );
 
-    var list = new Stocklist(stocks: _sortedStocks, query: _searchQuery);
+    var list = new StyleNode(
+      new Stocklist(stocks: _sortedStocks, query: _searchQuery),
+      _stocklistHeight);
 
     var fab = new FloatingActionButton(content: new Icon(
       type: 'content/add_white', size: 24), level: 3);