void ObjectSerialize(Serializer &s, const GCCell *cell) {
  JSObject::serializeObjectImpl(s, cell, JSObject::numOverlapSlots<JSObject>());
  s.endObject(cell);
}
void ObjectSerialize(Serializer &s, const GCCell *cell) {
  JSObject::serializeObjectImpl(s, cell, JSObject::numOverlapSlots<JSObject>());
  s.endObject(cell);
}