How to use the react-instantsearch-dom/server.findResultsState function in react-instantsearch-dom

server.get('/', async (req, res) => {
  const { App, props } = createApp();

  // URLSync
  const searchState = {
    query: 'iPhone',
    refinementList: {
      brand: ['Apple'],
    },
  };

  const resultsState = await findResultsState(App, {
    ...props,
    searchState,
  });

  const initialState = {
    resultsState,
    searchState,
  };

  const body = ReactDOM.renderToString();

  res.send(
    template({
      title: 'Hello World from the server',
      initialState: JSON.stringify(initialState),
      body,

static async getInitialProps({ asPath }) {
    const searchState = pathToSearchState(asPath);
    const resultsState = await findResultsState(App, {
      ...DEFAULT_PROPS,
      searchState,
    });

    return {
      resultsState,
      searchState,
    };
  }

server.get('/', async (_, res) => {
  const { App, props } = createApp();

  const searchState = {
    query: 'iPhone',
    page: 5,
    refinementList: {
      brand: ['Apple'],
    },
  };

  const resultsState = await findResultsState(App, {
    ...props,
    searchState,
  });

  const initialState = {
    searchState,
    resultsState,
  };

  const plainHTML = renderToString();

  res.send(
    template({
      body: plainHTML,
      title: 'Hello World from the server',
      initialState: JSON.stringify(initialState),