code: function GlobSync(pattern, options, shouldIgnore) {
  
      /**
       * We don't put this thing to argument `options` to avoid
       * further problems, such as `options` validation.
       *
       * Use `Symbol` as much as possible to avoid confliction.
       */
      this[IGNORE] = shouldIgnore;
  
      Sync.call(this, pattern, options);
  }
docs: Subclass of `glob.GlobSync`
  @param {string}     pattern      Pattern to be matched.
  @param {Object}     options      `options` for `glob`
  @param {function()} shouldIgnore Method to check whether a directory should be ignored.
  @constructor