public static function getInstance() { if (!is_object(self::$instance)) { self::$instance = new self(); } return self::$instance; }
public static function getSelectableFields() { return J2StoreSelectableFields::getInstance(); }
public static function getSelectableFields() { if (!self::$fields) { require_once 'selectable/fields.php'; self::$fields = J2StoreSelectableFields::getInstance(); } return self::$fields; }