FactoryGirl\Provider\Doctrine\DateIntervalHelper::years PHP Метод

    public function years($years)
    {
        if (!is_numeric($years)) {
            throw new \RuntimeException();
        }
        $interval = new \DateInterval('P' . $years . 'Y');
        $interval->invert = (int) $this->negative;
        $this->time->add($interval);
        return $this;
    }