public function getExportFilename(AdminInterface $admin, string $format): string
    {
        $class = $admin->getClass();

        return sprintf(
            'export_%s_%s.%s',
            strtolower(substr($class, strripos($class, '\\') + 1)),
            date('Y_m_d_H_i_s', strtotime('now')),
            $format
        );
    }