anchor.diff:  import 'package:analyzer/src/summary/idl.dart';
   import 'package:analyzer/src/summary/link.dart';
   import 'package:analyzer/src/summary/package_bundle_reader.dart';
  -import 'package:analyzer/src/summary/summarize_elements.dart';
   
   /**
    * This class computes [AnalysisResult]s for Dart files.
  
positive.code:           String key = '${library.transitiveSignature}.linked';
            List<int> bytes = _byteStore.get(key);
            if (bytes != null) {
              PackageBundle linked = new PackageBundle.fromBuffer(bytes);
              _addToStoreLinked(
                  store, library.uriStr, linked.linkedLibraries.single);
            } else {
              libraryUrisToLink.add(library.uriStr);
            }
  
negative.code: 
    /**
     * Return the context in which the [library] should be analyzed it.
     */
    _LibraryContext _createLibraryContext(FileState library) {
      return _logger.run('Create library context', () {
  