| Index: utils/pub/yaml/composer.dart
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| diff --git a/utils/pub/yaml/composer.dart b/utils/pub/yaml/composer.dart
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| index 671cbdf30b8ecf3616f92c3d59bd4ebf1b07b046..9558443991aa293cbf2b9277a693657680d3d24d 100644
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| --- a/utils/pub/yaml/composer.dart
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| +++ b/utils/pub/yaml/composer.dart
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| @@ -59,7 +59,7 @@ class _Composer extends _Visitor {
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|        'float': parseFloat, 'str': parseString
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|      };
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|  
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| -    for (var key in tagParsers.getKeys()) {
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| +    for (var key in tagParsers.keys) {
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|        if (scalar.tag.name != _Tag.yaml(key)) continue;
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|        var result = tagParsers[key](scalar.content);
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|        if (result != null) return setAnchor(scalar, result);
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| 
 |