po.leaves();
    public Set findContainerHierarchy(Class rootNodeType, Set leavesIDs,                                     Class rootLevel, long rootLevelID)        throws DSOutOfServiceException, DSAccessException    {        try {            PojoOptions po = new PojoOptions();            setRootOptions(po, rootLevel, rootLevelID);            po.countsFor(new Long(getUserDetails().getId()));            return gateway.findContainerHierarchy(rootNodeType, leavesIDs,                            po.map());        } catch (Exception e) {           throw new DSAccessException(e.getMessage());        }    }