| Index: pkg/analyzer/lib/error/error.dart
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| diff --git a/pkg/analyzer/lib/error/error.dart b/pkg/analyzer/lib/error/error.dart
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| index 5e582afe7ccd8dc8d49ce82c43e38218932efc88..2c15466d2896b493badbef5326728e2b8acb5ee7 100644
 | 
| --- a/pkg/analyzer/lib/error/error.dart
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| +++ b/pkg/analyzer/lib/error/error.dart
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| @@ -358,6 +358,7 @@ const List<ErrorCode> errorCodeValues = const [
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|    ParserErrorCode.EXTERNAL_OPERATOR_WITH_BODY,
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|    ParserErrorCode.EXTERNAL_SETTER_WITH_BODY,
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|    ParserErrorCode.EXTERNAL_TYPEDEF,
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| +  ParserErrorCode.EXTRANEOUS_MODIFIER,
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|    ParserErrorCode.FACTORY_TOP_LEVEL_DECLARATION,
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|    ParserErrorCode.FACTORY_WITHOUT_BODY,
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|    ParserErrorCode.FACTORY_WITH_INITIALIZERS,
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| 
 |