Как использовать функции js в Puphpeteer?

$page->evaluate(JsFunction::createWithBody("
	Object.defineProperty(navigator, 'languages', {
		get: function() {
			return ['de-DE', 'de'];
			},
		});
"));
$page->goto('https://intoli.com/blog/not-possible-to-block-chrome-headless/chrome-headless-test.html');

<?php

require_once('./vendor/autoload.php');

use Nesk\Puphpeteer\Puppeteer;
use Nesk\Rialto\Data\JsFunction;

$puppeteer=new Puppeteer;
$browser=$puppeteer->launch(['headless=false','args'=>['--no-sandbox','--user-agent='.$user_agent]]);
$page=$browser->newPage();
$page->evaluateOnNewDocument('Object.defineProperty(navigator, "languages", {
  get: function() {
    return ["de-DE", "de"];
  }
});');
$page->goto('https://intoli.com/blog/not-possible-to-block-chrome-headless/chrome-headless-test.html');

$content=$page->content();
echo $content;
$browser->close();