anchor.diff:  
     String toString() {
       return "class $type:\n" +
  -        elements.fold("", (a, b) => a + b.toString() + "\n");
  +        elements.values.fold("", (a, b) => a + b.toString() + "\n");
     }
   }
   
  
positive.code:   final Type type;
    final ClassMirror mir;
    String typeStr;
    final List<Element> elements;
    bool isMap;
    bool isList;
    Type listType;
  
negative.code:           element.isList = false;
            element.isPrimList = false;
          }
          elements[key] = element;
        }
      }
    });
  