useWrappedStore missing in next-redux-wrapper

I was trying to implement the next-redux-wrapper with redux-toolkit. As the example suggests in https://github.com/kirill-konshin/next-redux-wrapper/blob/master/packages/demo-redux-toolkit/pages/_app.tsx.

As the example suggests, the store should be wrapper with the useWrappedStore method. Unfortunately, it's not found anywhere in the library.

const MyApp: FC<AppProps> = ({Component, ...rest}) => {
    const {store, props} = wrapper.useWrappedStore(rest);
    return (
        <Provider store={store}>
            <Component {...props.pageProps} />
        </Provider>
    );
};

export default MyApp;

Anyone have any idea how to solve this?