Method InstanceVoidMethodCallbackWrapper

napi-inl.h:4817–4829

template <typename T>
inline napi_value InstanceWrap<T>::InstanceVoidMethodCallbackWrapper(
    napi_env env, napi_callback_info info) {
  return details::WrapCallback(env, [&] {
    CallbackInfo callbackInfo(env, info);
    InstanceVoidMethodCallbackData* callbackData =
        reinterpret_cast<InstanceVoidMethodCallbackData*>(callbackInfo.Data());
    callbackInfo.SetData(callbackData->data);
    T* instance = T::Unwrap(callbackInfo.This().As<Object>());
    auto cb = callbackData->callback;
    if (instance) (instance->*cb)(callbackInfo);
    return nullptr;
  });
}

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