| Index: pkg/analyzer/lib/src/summary/idl.dart
 | 
| diff --git a/pkg/analyzer/lib/src/summary/idl.dart b/pkg/analyzer/lib/src/summary/idl.dart
 | 
| index 76b5f521f3b9360d910cb1b1d13cb4ab78287bca..d960c4bbfd9ff143b108bfadae1be84583dd3a5a 100644
 | 
| --- a/pkg/analyzer/lib/src/summary/idl.dart
 | 
| +++ b/pkg/analyzer/lib/src/summary/idl.dart
 | 
| @@ -70,6 +70,12 @@ abstract class AnalysisDriverResolvedUnit extends base.SummaryClass {
 | 
|     */
 | 
|    @Id(0)
 | 
|    List<AnalysisDriverUnitError> get errors;
 | 
| +
 | 
| +  /**
 | 
| +   * The index of the unit.
 | 
| +   */
 | 
| +  @Id(1)
 | 
| +  AnalysisDriverUnitIndex get index;
 | 
|  }
 | 
|  
 | 
|  /**
 | 
| 
 |