bool JSObject::HasRealNamedProperty(Handle<JSObject> object,
                                    Handle<Name> key) {
  Isolate* isolate = object->GetIsolate();
  SealHandleScope shs(isolate);
  // Check access rights if needed.
  if (object->IsAccessCheckNeeded()) {
    if (!isolate->MayNamedAccess(*object, *key, v8::ACCESS_HAS)) {
      isolate->ReportFailedAccessCheck(*object, v8::ACCESS_HAS);
      return false;
    }
  }

  LookupResult result(isolate);
  object->LocalLookupRealNamedProperty(*key, &result);
  return result.IsFound() && !result.IsInterceptor();
}


bool JSObject::HasRealNamedCallbackProperty(Handle<JSObject> object,
                                            Handle<Name> key) {
  Isolate* isolate = object->GetIsolate();
  SealHandleScope shs(isolate);
  // Check access rights if needed.
  if (object->IsAccessCheckNeeded()) {
    if (!isolate->MayNamedAccess(*object, *key, v8::ACCESS_HAS)) {
      isolate->ReportFailedAccessCheck(*object, v8::ACCESS_HAS);
      return false;
    }
  }

  LookupResult result(isolate);
  object->LocalLookupRealNamedProperty(*key, &result);
  return result.IsPropertyCallbacks();
}