anchor.diff:  
   import 'dart:async';
   
  +import '../builder.dart';
  +import '../jobs.dart';
   import '../json/json_parser.dart';
   import '../json/json_validator.dart';
   import '../json/json_utils.dart';
  -import '../builder.dart';
  -import '../jobs.dart';
   import '../workspace.dart';
   import 'app_manifest_validator.dart';
   
  
positive.code: 
    FileErrorSink(
        this.file,
        String contents,
        this.markerType,
        this.markerSeverity)
        : this.lineOffsets = new StringLineOffsets(contents) {
      file.clearMarkers(markerType);
    }
  
  
negative.code:   final String jsonErrorMarkerType = "manifest_json.syntax";
    final int jsonErrorMarkerSeverity = Marker.SEVERITY_ERROR;
    final String validationErrorMarkerType = "manifest_json.semantics";
    final int validationErrorMarkerSeverity = Marker.SEVERITY_WARNING;
  }
  
  final appManifestProperties = new AppManifestProperties();
  