Method InstanceGetterCallbackWrapper

napi-inl.h:4846–4857

template <typename T>
inline napi_value InstanceWrap<T>::InstanceGetterCallbackWrapper(
    napi_env env, napi_callback_info info) {
  return details::WrapCallback(env, [&] {
    CallbackInfo callbackInfo(env, info);
    InstanceAccessorCallbackData* callbackData =
        reinterpret_cast<InstanceAccessorCallbackData*>(callbackInfo.Data());
    callbackInfo.SetData(callbackData->data);
    T* instance = T::Unwrap(callbackInfo.This().As<Object>());
    auto cb = callbackData->getterCallback;
    return instance ? (instance->*cb)(callbackInfo) : Napi::Value();
  });
}

template <typename T>
inline napi_value InstanceWrap<T>::InstanceSetterCallbackWrapper(