public void setRootDeviceName(String rootDeviceName) {
        this.rootDeviceName = rootDeviceName;
    }
<p>
The device name of the root device volume (for example, <code>/dev/sda1</code>).
</p>

@param rootDeviceName
       The device name of the root device volume (for example, <code>/dev/sda1</code>).
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/RegisterImageRequest.java