public function configureSerializerExtension(JMSSerializerExtension $ext)
{
$ext->addHandlerFactory(new ArticleAuthorHandlerFactory());
$ext->addHandlerFactory(new ArticleCommentsLinkHandlerFactory());
$ext->addHandlerFactory(new AuthorImageUriHandlerFactory());
$ext->addHandlerFactory(new PackageItemsLinkHandlerFactory());
$ext->addHandlerFactory(new ItemLinkHandlerFactory());
$ext->addHandlerFactory(new TopicArticlesLinkHandlerFactory());
$ext->addHandlerFactory(new ArticleFieldsHandlerFactory());
$ext->addHandlerFactory(new ArticleTranslationsHandlerFactory());
$ext->addHandlerFactory(new ArticleRenditionsHandlerFactory());
}