}
private byte readDeploymentSetRollback(Map<UUID, DeploymentSetPlanResult> setResults) throws IOException {
UUID setId = unmarshal(unmarshaller, UUID.class);
DeploymentSetPlanResult setResult = setResults.get(setId);
if (setResult == null) {
throw new IOException("Unknown deployment set plan " + setId);
}
// A valid deployment set plan will have at least one action