in src/Facebook/InstantArticles/Transformer/Transformer.php [588:609]
public function handleTransformationSettings($instantArticle)
{
if (!Type::isTextEmpty($this->getDefaultStyleName())) {
$instantArticle->withStyle($this->getDefaultStyleName());
}
if ($this->adsSettings) {
$ad = $this->adsSettings->getAdElement();
if ($ad) {
$instantArticle->getHeader()->addAd($ad);
}
}
if ($this->analyticsSettings) {
$analytics = $this->analyticsSettings->getAnalyticsElement();
if ($analytics) {
$instantArticle->addChild($analytics);
}
}
return $instantArticle;
}