| Index: pkg/compiler/lib/src/types/type_mask.dart
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| diff --git a/pkg/compiler/lib/src/types/type_mask.dart b/pkg/compiler/lib/src/types/type_mask.dart
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| index a3ba10ddf23977d71e616484b0a303dda584a57a..c91fac6bd504edd8e3237ba8347d14c41c6931dd 100644
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| --- a/pkg/compiler/lib/src/types/type_mask.dart
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| +++ b/pkg/compiler/lib/src/types/type_mask.dart
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| @@ -356,5 +356,5 @@ abstract class TypeMask implements ReceiverConstraint, AbstractValue {
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|     * on this mask. Returns null if there is none.
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|     */
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|    // TODO(johnniwinther): Move this method to [World].
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| -  Element locateSingleElement(Selector selector, Compiler compiler);
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| +  Element locateSingleElement(Selector selector, ClosedWorld closedWorld);
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|  }
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| 
 |