code: private RollingUpdateOp rollingUpdateUndeploy(final ZooKeeperClient client,
                                                  final RollingUpdateOpFactory opFactory,
                                                  final DeploymentGroup deploymentGroup,
                                                  final String host) {
      return rollingUpdateUndeploy(client, opFactory, deploymentGroup, host, true);
    }
docs: rollingUpdateUndeploy is used to undeploy jobs during a rolling update. It enables the
  'skipRedundantUndeploys' flag, which enables the redundantDeployment() check.