while (iter.hasNext()) {
                final String _key = (String) iter.next();
                final int _klen = _key.length();
                boolean match = false;

                if (_klen == key.length()) {
                    match = _key.equals(key);
                } else if (_klen < key.length()) {
                    match = _key.regionMatches(0, key, 0, _klen) && key.charAt(_klen) == '\\';
                }