/** * Returns the difference in a human readable format. * * @param Date $date The date to compare to. Default is null and this means that * the current object will be compared to the current time. * @param integer $detailLevel How much details do you want to get * * @return string * * @since 2.0.0 */ public function since(Date $date = null, $detailLevel = 1) { return $this->datetime->since(self::cast($date), $detailLevel); }