Symfony\Component\Translation\Loader\YamlFileLoader::load PHP Method

    public function load($resource, $locale, $domain = 'messages')
    {
        $messages = Yaml::load($resource);

        $catalogue = parent::load($messages, $locale, $domain);
        $catalogue->addResource(new FileResource($resource));

        return $catalogue;
    }

 /**
  * {@inheritdoc}
  */
 public function load($resource, $locale, $domain = 'messages')
 {
     $messages = parent::load($resource, $locale, $domain);
     foreach ($messages->all($domain) as $id => $translation) {
         $messages->set($id, $this->getTranslation($messages, $id, $domain));
     }
     return $messages;
 }