int desiredInstances) {
return IJobUpdate.build(new JobUpdate()
.setSummary(summary.newBuilder())
.setInstructions(new JobUpdateInstructions()
.setDesiredState(new InstanceTaskConfig()
.setTask(desired.newBuilder())
.setInstances(ImmutableSet.of(new Range(0, desiredInstances - 1))))
.setInitialState(ImmutableSet.of(new InstanceTaskConfig()
.setTask(initial.newBuilder())
.setInstances(ImmutableSet.of(new Range(0, intialInstances - 1)))))));
}