code: public function toArray()
      {
          return [
              'o_msg'   => $this->overflowMessage,
              'min_qty' => $this->minimumQuantity,
              'min_msg' => $this->minimumMessage,
              'max_qty' => INF === $this->maximumQuantity ? 'INF' : $this->maximumQuantity,
              'max_msg' => $this->maximumMessage,
              'a_qty'   => INF === $this->availableQuantity ? 'INF' : $this->availableQuantity,
              'a_msg'   => $this->availableMessage,
              'r_qty'   => $this->resupplyQuantity,
              'r_msg'   => $this->resupplyMessage,
          ];
      }
docs: Returns the array version.
  
  @return array