anchor.diff:            as FunctionEntity;
   
     late final ClassEntity setLiteralClass =
  -      _findClass(_env.lookupLibrary(Uris.dart_collection), 'LinkedHashSet')!;
  +      _findClass(collectionLibrary, 'LinkedHashSet');
   
     late final ConstructorEntity setLiteralConstructor =
         _env.lookupConstructor(setLiteralClass, '_literal')!;
  
positive.code:     if (_mapLiteralClass == null) {
        _mapLiteralClass = _env.lookupClass(coreLibrary, 'LinkedHashMap');
        if (_mapLiteralClass == null) {
          _mapLiteralClass = _findClass(
              _env.lookupLibrary(Uris.dart_collection), 'LinkedHashMap');
        }
      }
      return _mapLiteralClass!;
  
negative.code:       _findRtiClassField('_precomputed1');
  
    late final FunctionEntity rtiEvalMethod =
        _findClassMember(_rtiImplClass, '_eval');
  
    late final FunctionEntity rtiBindMethod =
        _findClassMember(_rtiImplClass, '_bind');
  
    late final FunctionEntity rtiAddRulesMethod =
        _findClassMember(_rtiUniverseClass, 'addRules');
  
    late final FunctionEntity rtiAddErasedTypesMethod =
        _findClassMember(_rtiUniverseClass, 'addErasedTypes');
  
    late final FunctionEntity rtiAddTypeParameterVariancesMethod =
        _findClassMember(_rtiUniverseClass, 'addTypeParameterVariances');
  
    FunctionEntity get installSpecializedIsTest =>
        _findRtiFunction('_installSpecializedIsTest');
  