| Index: sdk/lib/collection/linked_hash_map.dart
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| diff --git a/sdk/lib/collection/linked_hash_map.dart b/sdk/lib/collection/linked_hash_map.dart
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| index 431f7fa5ec1b657eb908bc006a87d8a46dd21caf..d41cb408b2e45d94b5bcf4ce5ff00561a9bf5ad9 100644
 | 
| --- a/sdk/lib/collection/linked_hash_map.dart
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| +++ b/sdk/lib/collection/linked_hash_map.dart
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| @@ -39,5 +39,7 @@ class LinkedHashMap<K, V> implements Map<K, V> {
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|  
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|    external bool get isEmpty;
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|  
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| +  external bool get isNotEmpty;
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| +
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|    String toString() => Maps.mapToString(this);
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|  }
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| 
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