protected function get_active_extensions()
{
return array('video' => class_exists('wpseo_Video_Sitemap'), 'woocommerce' => class_exists('Woocommerce') && class_exists('Yoast_WooCommerce_SEO'), 'news' => class_exists('WPSEO_News'), 'local' => defined('WPSEO_LOCAL_VERSION'));
}