public String getLastSoftwareUpdate() {
        return this.lastSoftwareUpdate;
    }
<p>
The date on which the last software update was applied to the gateway. If the gateway has never been updated,
this field does not return a value in the response. This only only exist and returns once it have been chosen and
set by the SGW service, based on the OS version of the gateway VM
</p>

@return The date on which the last software update was applied to the gateway. If the gateway has never been
        updated, this field does not return a value in the response. This only only exist and returns once it
        have been chosen and set by the SGW service, based on the OS version of the gateway VM
aws-java-sdk-storagegateway/src/main/java/com/amazonaws/services/storagegateway/model/DescribeGatewayInformationResult.java