// (member:1.2.840.113556.1.4.1941:=%s)
        if (subRoleSet.isEmpty()) {
            return;
        }
        String filter = subRoleSet.stream().map(s -> String.format(groupFilter, s)).collect(Collectors.joining());
        if (subRoleSet.size() > 1) {
            filter = "(|" + filter + ")";
        }

        if (logger.isDebugEnabled()) {
            logger.debug("Group filter: {}", filter);
        }

            } finally {
                w.write(null, -1, null);
                w.interrupt();
                try {
                    w.join();
                } catch (final InterruptedException e) {
                    log.warn("Interrupted while joining copy thread", e);
                }
            }
        } catch (final CIFSException e) {
            throw SmbException.wrap(e);
        }