public function hasRoomBetween(Carbon $startAt, Carbon $finishAt)
    {
        return $this->capacity > $this->business
                                      ->bookings()
                                      ->active()
                                      ->affectingInterval($startAt, $finishAt)
                                      ->affectingHumanresource($this->humanresource_id)
                                      ->count() &&
            ($this->start_at <= $startAt && $this->finish_at >= $finishAt);
    }