Change the name of Component.render to Component.build in Effen

sky/examples/fn/widgets/drawer.dart

 part of widgets;
 
 const double _kWidth = 256.0;
 const double _kMinFlingVelocity = 0.4;
 const double _kBaseSettleDurationMS = 246.0;
 const double _kMaxSettleDurationMS = 600.0;
 const Cubic _kAnimationCurve = easeOut;
 
 class DrawerAnimation {
 
@@ skipping 134 matching lines @@
       return;
 
     _listening = true;
     animation.onPositionChanged.listen((position) {
       setState(() {
         _position = position;
       });
     });
   }
 
-  Node render() {
+  Node build() {
     _ensureListening();
 
     bool isClosed = _position <= -_kWidth;
     String inlineStyle = 'display: ${isClosed ? 'none' : ''}';
     String maskInlineStyle = 'opacity: ${(_position / _kWidth + 1) * 0.25}';
     String contentInlineStyle = 'transform: translateX(${_position}px)';
 
     Container mask = new Container(
       key: 'Mask',
       style: _maskStyle,
@@ skipping 12 matching lines @@
       style: _style,
       inlineStyle: inlineStyle,
       children: [ mask, content ]
     )..events.listen('pointerdown', animation.handlePointerDown)
      ..events.listen('pointermove', animation.handlePointerMove)
      ..events.listen('pointerup', animation.handlePointerUp)
      ..events.listen('pointercancel', animation.handlePointerCancel);
 
   }
 }