docs: function defaultUngrep(targets) {
      if (targets && targets.length) {
          var ungreps = [], target, len = targets.length;
  
          for (var i = 0; i < len; i++) {
              target = targets[i];
              target = '(?:^' + path.dirname(target) + sep + '){1}';
              target += '(?:/?.*/?)*' + NM_SEG;
              ungreps.push(new RegExp(escape(target)));
          }
          return ungreps;
      }
      return [new RegExp(escape(NM_SEG))];
  }