. namespace core; /** * Testable version of the encryption class - just makes it possible to unit-test protected * function. * * @package core * @copyright 2020 The Open University * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ class testable_encryption extends encryption { public static function get_key(?string $method = null): string { return parent::get_key($method); } }