anchor.diff:            List<int> bytes = _byteStore.get(key);
             if (bytes != null) {
               PackageBundle linked = new PackageBundle.fromBuffer(bytes);
  -            store.addBundle(null, linked);
  +            _addToStoreLinked(
  +                store, node.uri.toString(), linked.linkedLibraries.single);
             } else {
               libraryUrisToLink.add(node.uri.toString());
             }
  
positive.code:   }
  
    /**
     * TODO(scheglov) replace with actual [AnalysisResult] computing.
     */
    List<String> _computeAndPrintErrors(_File file) {
  
negative.code: 
      // Compute URIs.
      _ReferencedUris referencedUris = new _ReferencedUris();
      for (Directive directive in file.unit.directives) {
        if (directive is PartOfDirective) {
          referencedUris.isLibrary = false;
  