| Index: sdk/lib/_collection_dev/list.dart
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| diff --git a/sdk/lib/_collection_dev/list.dart b/sdk/lib/_collection_dev/list.dart
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| index c14cb502a6be53e582ff8bfeda6da28424a32bc3..90a1d1643f200a62bb4ead6893c883ae5a02fd6a 100644
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| --- a/sdk/lib/_collection_dev/list.dart
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| +++ b/sdk/lib/_collection_dev/list.dart
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| @@ -238,6 +238,7 @@ class ListMapView<E> implements Map<int, E> {
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|    Iterable<int> get keys => new _ListIndicesIterable(_values);
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|  
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|    bool get isEmpty => _values.isEmpty;
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| +  bool get isNotEmpty => _values.isNotEmpty;
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|    bool containsValue(E value) => _values.contains(value);
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|    bool containsKey(int key) => key is int && key >= 0 && key < length;
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|  
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| 
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