anchor.diff:  
   // Temporary feature flag for deferred loading.
   bool deferredLoadingSupportEnabled = false;
  +
  +const _artificialRootNodeName = 'ArtificialRoot';
  +const _entireAppNodeName = 'Entire App';
  +const _deferredNodeName = 'Deferred';
  +const _mainNodeName = 'Main';
  +const _rootNodeName = 'Root';
   
   enum DiffTreeType {
     increaseOnly,
  
positive.code: 
    static const identicalFilesError =
        'Failed to load diff: OLD and NEW files are identical.';
  
    static const artificialRootNodeName = 'ArtificialRoot';
  
    static const mainNodeName = 'Main';
  
    CallGraph? _analysisCallGraph;
  
  
negative.code:     if (_hasDeferredInfo(jsonFile)) {
        jsonFile['children'] = _extractChildren(jsonFile)
            .where((child) => child['isDeferred'] == true);
        jsonFile['n'] = _deferredNodeName;
      }
      return jsonFile;
    }
  
    Map<String, dynamic> _includeEntireApp(Map<String, dynamic> jsonFile) {
      if (_hasDeferredInfo(jsonFile)) {
        jsonFile['n'] = _entireAppNodeName;
      }
      return jsonFile;
    }
  