How to use the inferno-vnode-flags.ChildFlags.UnknownChildren function in inferno-vnode-flags

it('Should be possible to render Fragment #1', () => {
      const vNode = (
        <div>
          {createFragment(
            [<div>Lets go!</div>, null, createFragment([<div>World</div>, 'Of', <em>Fragments</em>], ChildFlags.UnknownChildren), 'text node'],
            ChildFlags.UnknownChildren
          )}
        </div>
      );
      const renderedString = renderToString(vNode);

      expect(renderedString).toBe('<div><div>Lets go!</div><div>World</div>Of<em>Fragments</em>text node</div>');

      const container = document.createElement('div');

      container.innerHTML = renderedString;

      const emTag = container.querySelector('em');

      hydrate(vNode, container);

it('Should be possible to render Fragment #1', () => {
      const vNode = (
        <div>
          {createFragment(
            [<div>Lets go!</div>, null, createFragment([<div>World</div>, 'Of', <em>Fragments</em>], ChildFlags.UnknownChildren), 'text node'],
            ChildFlags.UnknownChildren
          )}
        </div>
      );
      const renderedString = renderToString(vNode);

      expect(renderedString).toBe('<div><div>Lets go!</div><div>World</div>Of<em>Fragments</em>text node</div>');

      const container = document.createElement('div');

      container.innerHTML = renderedString;

      const emTag = container.querySelector('em');

      hydrate(vNode, container);

      expect(container.innerHTML).toBe('<div><div>Lets go!</div><div>World</div>Of<em>Fragments</em>text node</div>');

children[childLen] = arguments[childLen + 2];
    }
  }

  props.children = children;

  if (flags & VNodeFlags.Component) {
    return createComponentVNode(flags, vNodeToClone.type, !vNodeToClone.props && !props ? EMPTY_OBJ : combineFrom(vNodeToClone.props, props), key, ref);
  }

  if (flags & VNodeFlags.Text) {
    return createTextVNode(children);
  }

  if (flags & VNodeFlags.Fragment) {
    return createFragment(childLen === 1 ? [children] : children, ChildFlags.UnknownChildren, key);
  }

  return normalizeProps(
    createVNode(flags, vNodeToClone.type, className, null, ChildFlags.HasInvalidChildren, combineFrom(vNodeToClone.props, props), key, ref)
  );
}