/** * Main Pootle Page Builder Addon Boilerplate Instance * Ensures only one instance of Storefront_Extension_Boilerplate is loaded or can be loaded. * @since 1.0.0 * @return Pootle_PB_Portfolios instance */ public static function instance() { if (null == self::$_instance) { self::$_instance = new self(); } return self::$_instance; }