oc-client renderComponents is not defined

server.js

const path = require('path');
var express = require('express');
var router = express.Router();
const app = express();

var Client = require('oc-client');

var client = new Client({
  registries: { serverRendering: 'https://ac-oc-registry-test.herokuapp.com/'},
  components: {
    "jade-test": '1.0.0'
  }
});

client.init({
  headers: { 'accept-language': 'en-US'}
}, function(error, responses){
  console.log(error);
  console.log(responses);
});



router.get('/', (req, res) => {
  res.sendFile(
    path.join(__dirname, '/src/pages/index-client-side-rendering.html')
  )
});

app.use('/', router);

const port = 3330
console.log(`Client app listening on port ${port}!`)
app.listen(port, () => console.log(`Example app listening on port ${port}!`))