How to use genClassForVnode method in Playwright Internal

1/* @flow */
2
3import { escape } from '../util'
4import { genClassForVnode } from 'web/util/index'
5
6export default function renderClass (node: VNodeWithData): ?string {
7  const classList = genClassForVnode(node)
8  if (classList !== '') {
9    return ` class="${escape(classList)}"`
10  }
11}
12

Source: class.js

/* @flow */

import { escape } from '../util'
import { genClassForVnode } from 'web/util/index'

export default function renderClass (node: VNodeWithData): ?string {
  const classList = genClassForVnode(node)
  if (classList !== '') {
    return ` class="${escape(classList)}"`
  }
}