void start_dispatching(JSObject *self) {
  MOZ_ASSERT(!is_dispatching(self));
  JS::SetReservedSlot(self, Slots::Dispatch, JS::TrueValue());
}
void start_dispatching(JSObject *self) {
  MOZ_ASSERT(!is_dispatching(self));
  JS::SetReservedSlot(self, Slots::Dispatch, JS::TrueValue());
}