Airship\Engine\Security\AirBrake::getCutoff PHP Method

    public function getCutoff(int $expire) : \DateInterval
    {
        $d1 = new \DateTime();
        $d2 = clone $d1;
        $d2->sub(new \DateInterval('PT' . $expire . 'S'));
        return $d2->diff($d1);
    }