anchor.diff:    }
   
     /**
  -   * Return info for debugging https://github.com/dart-lang/sdk/issues/35226.
  -   */
  -  @override
  -  Map<String, Object> debugInfo() {
  -    var result = super.debugInfo();
  -    result['directory'] = _sdkDirectory.path;
  -    return result;
  -  }
  -
  -  /**
      * Determine the search order for trying to locate the [_LIBRARIES_FILE].
      */
     Iterable<File> get _libraryMapLocations sync* {
  
positive.code:     });
    }
  
    @override
    Source fromFileUri(Uri uri) {
      File file =
  
negative.code:     yield libraryDirectory
          .getChildAssumingFolder(_INTERNAL_DIR)
          .getChildAssumingFile(_LIBRARIES_FILE);
    }
  
    /**
     * Return info for debugging https://github.com/dart-lang/sdk/issues/35226.
     */
    @override
    Map<String, Object> debugInfo() {
      var result = super.debugInfo();
      result['directory'] = _sdkDirectory.path;
      return result;
    }
  
    @override
  