| Index: samples/swarm/DataSource.dart
 | 
| diff --git a/samples/swarm/DataSource.dart b/samples/swarm/DataSource.dart
 | 
| index 662e1d55a7d92496fbf2275ca7668d5bc26f069a..dd9c6dd37c8de664b1c13ffdb3952a30a6961062 100644
 | 
| --- a/samples/swarm/DataSource.dart
 | 
| +++ b/samples/swarm/DataSource.dart
 | 
| @@ -90,11 +90,6 @@ class Sections extends Collection<Section> {
 | 
|  
 | 
|    List<Section> get sections => _sections;
 | 
|  
 | 
| -  // Collection<Section> methods:
 | 
| -  bool every(bool f(Section element)) => IterableMixinWorkaround.every(this, f);
 | 
| -  bool any(bool f(Section element)) => IterableMixinWorkaround.any(this, f);
 | 
| -  void forEach(void f(Section element)) { IterableMixinWorkaround.forEach(this, f); }
 | 
| -
 | 
|    // TODO(jmesserly): this should be a property
 | 
|    bool get isEmpty => length == 0;
 | 
|  }
 | 
| 
 |