checkCanModifyAc(path);
List currentPolicies = Arrays.asList(acMgr.getPolicies(path));
AccessControlPolicyIterator it = acMgr.getApplicablePolicies(path);
if (it.hasNext()) {
AccessControlPolicy policy = it.nextAccessControlPolicy();
acMgr.setPolicy(path, policy);
superuser.refresh(false);
String mgs = "Reverting 'setPolicy' must change back the return value of getPolicies.";
if (currentPolicies.isEmpty()) {