SortedMap<K, V> unfiltered, final Predicate<? super K> keyPredicate) {
    // TODO(lowasser): Return a subclass of Maps.FilteredKeyMap for slightly better
    // performance.
    return filterEntries(unfiltered, Maps.<K>keyPredicateOnEntries(keyPredicate));
  }

  /**
   * Returns a navigable map containing the mappings in {@code unfiltered} whose keys satisfy a

        return listFiles( "*", ATTR_DIRECTORY | ATTR_HIDDEN | ATTR_SYSTEM, null, null );
    }

/**
 * The CIFS protocol provides for DOS "wildcards" to be used as
 * a performance enhancement. The client does not have to filter
 * the names and the server does not have to return all directory
 * entries.
 * <p>
 * The wildcard expression may consist of two special meta