protected void attachVolume(Optional<Instance> instance, Optional<Volume> volume)
{
if (instance.isPresent() && volume.isPresent())
{
AttachVolumeResult result = ec2Client.attachVolume(new AttachVolumeRequest().
withInstanceId(instance.get().getInstanceId()).
withVolumeId(volume.get().getVolumeId()).
withDevice(blockDeviceInformation.getSDevice()));
try