/**
  * @param null $currentTime
  * @param int $nth
  * @param bool|false $invert
  * @param bool|false $allowCurrentDate
  * @return Carbon
  */
 protected function getRunDate($currentTime = null, $nth = 0, $invert = false, $allowCurrentDate = false)
 {
     return Carbon::instance(parent::getRunDate($currentTime, $nth, $invert, $allowCurrentDate));
 }