public Optional<String> hardwareAddress() {
        return Optional.ofNullable(this.hardwareAddress);
    }
@return HardwareAddress represents the hardware address (e.g. MAC Address) of the device&#39;s network interface.

Must not be longer than 128 characters.
sdk/java/src/main/java/com/pulumi/kubernetes/resource/v1alpha3/outputs/NetworkDeviceData.java