anchor.diff:        // be found with the LibraryIndex class.
         return;
       }
  -    members[getDisambiguatedName(member)] = member;
  +    _members[getDisambiguatedName(member)] = member;
     }
   
     String get containerName {
  
positive.code: class _MemberTable {
    final _ClassTable parent;
    final Class class_; // Null for top-level.
    final Map<String, Member> members = <String, Member>{};
  
    Library get library => parent.library;
  
    _MemberTable(this.parent, this.class_) {
      class_.procedures.forEach(addMember);
      class_.fields.forEach(addMember);
      class_.constructors.forEach(addMember);
    }
  
    _MemberTable.topLevel(this.parent) : class_ = null {
      library.procedures.forEach(addMember);
      library.fields.forEach(addMember);
    }
  
    String getDisambiguatedName(Member member) {
  
negative.code:   /// are needed.
    LibraryIndex.all(Program program) {
      for (var library in program.libraries) {
        _libraries['${library.importUri}'] = new _ClassTable(library);
      }
    }
  
  