public void setLastSoftwareUpdate(String lastSoftwareUpdate) {
        this.lastSoftwareUpdate = 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>

@param lastSoftwareUpdate
       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