| Index: sdk/lib/collection/hash_map.dart
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| diff --git a/sdk/lib/collection/hash_map.dart b/sdk/lib/collection/hash_map.dart
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| index f5fcd8514316cac8db7f30c3aacb0378f2bf1468..431c89f5dc21dcc2eecb501073fe495d326a0c1a 100644
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| --- a/sdk/lib/collection/hash_map.dart
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| +++ b/sdk/lib/collection/hash_map.dart
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| @@ -13,6 +13,7 @@ class HashMap<K, V> implements Map<K, V> {
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|  
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|    external int get length;
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|    external bool get isEmpty;
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| +  external bool get isNotEmpty;
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|  
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|    external Iterable<K> get keys;
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|    external Iterable<V> get values;
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| 
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