public DescribeGatewayInformationResult withLastSoftwareUpdate(String lastSoftwareUpdate) {
        setLastSoftwareUpdate(lastSoftwareUpdate);
        return this;
    }
<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
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-storagegateway/src/main/java/com/amazonaws/services/storagegateway/model/DescribeGatewayInformationResult.java