anchor.diff:          }
         });
         _cachedInstanceMembers =
  -          new _UnmodifiableMapView<Symbol, MethodMirror>(result);
  +          new UnmodifiableMapView<Symbol, MethodMirror>(result);
       }
       return _cachedInstanceMembers;
     }
  
positive.code:         }
        });
        _cachedStaticMembers =
            new _UnmodifiableMapView<Symbol, MethodMirror>(result);
      }
      return _cachedStaticMembers;
    }
  
negative.code:     decls.addAll(_constructors);
      typeVariables.forEach((tv) => decls[tv.simpleName] = tv);
      return _declarations =
          new UnmodifiableMapView<Symbol, DeclarationMirror>(decls);
    }
  
    Map<Symbol, Mirror> _cachedMembers;
  