private function populate()
{
$article = new TranslatableArticle();
$article->setTitle('the title');
$article->setCode('my code');
$this->em->persist($article);
$this->em->flush();
$this->em->clear();
$this->articleId = $article->getId();
}
public function addArticle(TranslatableArticle $article)
{
$article->setPage($this);
$this->articles[] = $article;
}