anchor.diff:  
     @override
     Widget build(BuildContext context) {
  -    return new Scaffold(
  -      appBar: new AppBar(
  +    return Scaffold(
  +      appBar: AppBar(
           title: const Text('Test explicit intents'),
         ),
  -      body: new Center(
  -        child: new Padding(
  +      body: Center(
  +        child: Padding(
             padding: const EdgeInsets.symmetric(vertical: 15.0),
  -          child: new Column(
  +          child: Column(
               mainAxisAlignment: MainAxisAlignment.spaceEvenly,
               children: <Widget>[
  -              new RaisedButton(
  +              RaisedButton(
                   child: const Text(
                       'Tap here to display panorama\nimagery in Google Street View.'),
                   onPressed: _openGoogleMapsStreetView,
                 ),
  -              new RaisedButton(
  +              RaisedButton(
                   child: const Text('Tap here to display\na map in Google Maps.'),
                   onPressed: _displayMapInGoogleMaps,
                 ),
  -              new RaisedButton(
  +              RaisedButton(
                   child: const Text(
                       'Tap here to launch turn-by-turn\nnavigation in Google Maps.'),
                   onPressed: _launchTurnByTurnNavigationInGoogleMaps,
                 ),
  -              new RaisedButton(
  +              RaisedButton(
                   child: const Text('Tap here to open link in Google Chrome.'),
                   onPressed: _openLinkInGoogleChrome,
                 ),
  -              new RaisedButton(
  +              RaisedButton(
                   child: const Text(
                       'Tap here to test explicit intent fallback to implicit.'),
                   onPressed: _testExplicitIntentFallback,
  
positive.code:   Widget build(BuildContext context) {
      Widget body;
      if (const LocalPlatform().isAndroid) {
        body = new Padding(
          padding: const EdgeInsets.symmetric(vertical: 15.0),
          child: new Column(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: <Widget>[
              new RaisedButton(
                child: const Text(
                    'Tap here to set an alarm\non weekdays at 9:30pm.'),
                onPressed: _createAlarm,
              ),
              new RaisedButton(
                  child: const Text('Tap here to test explicit intents.'),
                  onPressed: () => _openExplicitIntentsView(context)),
            ],
  
negative.code:   }
  
    void _launchTurnByTurnNavigationInGoogleMaps() {
      final AndroidIntent intent = AndroidIntent(
          action: 'action_view',
          data: Uri.encodeFull(
              'google.navigation:q=Taronga+Zoo,+Sydney+Australia&avoid=tf'),
  