gistfile1.php

    /**
     * Set sent at now.
     *
     * @return ItemSent
     */
    public function setSentAtNow()
    {
        return $this->setSentAt(new \DateTime());
    }

    /**
     * Set sent at.
     *
     * @param \DateTime $sentAt Sent at.
     *
     * @return ItemSent
     */
    public function setSentAt(\DateTime $sentAt)
    {
        $this->set(self::KEY_SENT_AT, $sentAt->getTimestamp());

        return $this;
    }

    /**
     * Return set at.
     *
     * @return \DateTime
     */
    public function getSentAt()
    {
        return (
            (new \DateTime())->setTimestamp($this->get(self::KEY_SENT_AT))
        );
    }