CanonicalUser owner = new CanonicalUser();
owner.setID(enginePolicy.getOwner().getID());
owner.setDisplayName(enginePolicy.getOwner().getDisplayName());
policy.setOwner(owner);
AccessControlList acl = new AccessControlList();
acl.setGrant(toGrants(enginePolicy.getGrants()));
policy.setAccessControlList(acl);
return policy;
}