anchor.diff:  //     "pattern": ".",
   //     "action": [
   //       "dart/sdk/bin/dart",
  -//       "dart/sdk/pkg/compiler/samples/darttags/darttags.dart",
  +//       # Replace "xcodebuild" with "out" on Linux, and "build" on Windows.
  +//       "-pdart/xcodebuild/ReleaseIA32/packages/",
  +//       "dart/pkg/compiler/samples/darttags/darttags.dart",
   //       "dart/TAGS"
   //     ],
   //   },
  
positive.code:   uris.add(myLocation.resolve(DART2JS));
    uris.add(myLocation.resolve(DART2JS_MIRROR));
  
    analyze(uris, myLocation.resolve(SDK_ROOT), null, handler.provider, handler)
        .then(processMirrors);
  }
  
  
negative.code: import 'package:_internal/libraries.dart'
      show LIBRARIES, LibraryInfo;
  
  import 'package:compiler/src/mirrors/analyze.dart'
      show analyze;
  import 'package:compiler/src/mirrors/dart2js_mirrors.dart'
      show BackDoor;
  import 'package:compiler/src/mirrors/mirrors_util.dart' show nameOf;
  
  import 'package:compiler/src/filenames.dart';
  import 'package:compiler/src/source_file.dart';
  import 'package:compiler/src/source_file_provider.dart';
  import 'package:compiler/src/util/uri_extras.dart';
  
  const DART2JS = '../../lib/src/dart2js.dart';
  const DART2JS_MIRROR = '../../lib/src/mirrors/dart2js_mirrors.dart';
  const SDK_ROOT = '../../../../sdk/';
  
  bool isPublicDart2jsLibrary(String name) {
    return !name.startsWith('_') && LIBRARIES[name].isDart2jsLibrary;
  