anchor.diff:        // be found with the LibraryIndex class.
         return;
       }
  -    members[getDisambiguatedName(member)] = member;
  +    _members[getDisambiguatedName(member)] = member;
     }
   
     String get containerName {
  
positive.code: }
  
  class _ClassTable {
    Library library;
    final Map<String, _MemberTable> classes = <String, _MemberTable>{};
  
    void build(Library library) {
      this.library = library;
      classes[LibraryIndex.topLevel] = new _MemberTable.topLevel(this);
      for (var class_ in library.classes) {
        classes[class_.name] = new _MemberTable(this, class_);
      }
    }
  
    String get containerName {
  
negative.code: 
    /// Indexes the libraries with the URIs given in [libraryUris].
    LibraryIndex(Program program, Iterable<String> libraryUris) {
      var libraryUriSet = libraryUris.toSet();
      for (var library in program.libraries) {
        var uri = '${library.importUri}';
        if (libraryUriSet.contains(uri)) {
          _libraries[uri] = new _ClassTable(library);
        }
      }
    }
  