anchor.diff:    Element lookupLocalMember(String memberName) {
       return _unsupported('lookupLocalMember');
     }
  -}+}
  
positive.code:     show Compiler;
  import '../constants/constructors.dart';
  import '../constants/expressions.dart';
  import '../dart_types.dart';
  import '../elements/elements.dart';
  import '../elements/modelx.dart' show
  
negative.code:   bool get hasLocalScopeMembers => _unsupported('hasLocalScopeMembers');
  
    @override
    bool implementsFunction(CoreClasses coreClasses) {
      return _unsupported('implementsFunction');
    }
  
  