ShipmentName issue while creating Inbound Shipment from Plan about amazon-mws-laravel HOT 1 OPEN

/**
     * This function is created for set shipment name externally on 28-Sept-2020
     * Sets the shipment Name. (Required)
     * @param string $s <p>Shipment Name</p>
     * @return boolean <b>FALSE</b> if improper input
     */
    public function setShipmentName($s)
    {
        if (is_string($s) && $s) {
            $this->options['InboundShipmentHeader.ShipmentName'] = $s;
        } else {
            return false;
        }
    }