anchor.diff:            _push(AstFactory.methodInvocation(
                 null, 'identical', <Expression>[first, second]));
             break;
  -      // TODO(scheglov) complete implementation
  +        // TODO(scheglov) complete implementation
           case UnlinkedConstOperation.makeUntypedList:
           case UnlinkedConstOperation.makeTypedList:
           case UnlinkedConstOperation.makeUntypedMap:
  
positive.code:   }
  
    /**
     * Build an [ElementLocationImpl] for the entity in the given [unit] of the
     * given [dependency], having the given [name].
     */
    ElementLocationImpl getReferencedLocation(
        LinkedDependency dependency, int unit, String name) {
      Source referencedLibrarySource = summaryResynthesizer.sourceFactory
          .resolveUri(librarySource, dependency.uri);
      String referencedLibraryUri = referencedLibrarySource.uri.toString();
  
negative.code:       } else if (name == 'void') {
          type = VoidTypeImpl.instance;
        } else {
          ElementLocation location = new ElementLocationImpl.con3(
              getReferencedLocationComponents(
                  linkedReference.dependency, linkedReference.unit, name));
          switch (linkedReference.kind) {
            case ReferenceKind.classOrEnum:
              element = new ClassElementHandle(summaryResynthesizer, location);
  