anchor.diff:    List<int> _computeLinkedBundleBytes() {
       final librarySources =
           sdkLibraries.map((library) => mapDartUri(library.shortName)).toList();
  -    return new SummaryBuilder(librarySources, context).build();
  +    return SummaryBuilder(librarySources, context).build();
     }
   }
   
  
positive.code:       {bool generateSummaryFiles = false,
        bool dartAsync = true,
        resource.MemoryResourceProvider resourceProvider})
        : provider = resourceProvider ?? new resource.MemoryResourceProvider(),
          sdkLibraries = dartAsync ? _LIBRARIES : [_LIB_CORE],
          uriMap = dartAsync ? FULL_URI_MAP : NO_ASYNC_URI_MAP {
      for (var library in sdkLibraries.cast<_MockSdkLibrary>()) {
  
negative.code: }
  ''');
  
  const _LIBRARIES = <SdkLibrary>[
    _LIB_CORE,
    _LIB_ASYNC,
    _LIB_COLLECTION,
  