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    if ($action == 'alias') {      $alias = drupal_get_path_cache($path);      if (isset($map[$path]) || array_key_exists($path, $map)) {        return $map[$path];      }      else if (isset($alias)) {        $map[$path] = $alias;        return $alias;      }      else {        $alias = db_result(db_query("SELECT dst FROM {url_alias} WHERE src = '%s'", $path));        $map[$path] = $alias;        return $alias;      }    }