public static function config_set_edit_form_data(moodleform $editform, array $config) {
        $data = array();
        $data['server'] = $config['server'];
        $data['prefix'] = !empty($config['prefix']) ? $config['prefix'] : '';
        $data['password'] = !empty($config['password']) ? $config['password'] : '';
        if (!empty($config['serializer'])) {
            $data['serializer'] = $config['serializer'];
        }
        $editform->set_data($data);
    }