| Index: corelib/src/exceptions.dart
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| ===================================================================
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| --- corelib/src/exceptions.dart	(revision 8116)
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| +++ corelib/src/exceptions.dart	(working copy)
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| @@ -159,8 +159,11 @@
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|  
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|  
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|  class NotImplementedException implements Exception {
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| -  const NotImplementedException();
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| -  String toString() => "NotImplementedException";
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| +  const NotImplementedException([String this._message]);
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| +  String toString() => (this._message !== null
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| +                        ? "NotImplementedException: $_message"
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| +                        : "NotImplementedException");
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| +  final String _message;
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|  }
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|  
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|  
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| 
 |