code: function(pattern, options) {
      var opts = this.setDefaults(options);
      if (typeof opts.recurse === 'boolean') {
        return opts.recurse;
      }
      return pattern.isGlobstar;
    }
docs: Return `true` if the iterator should recurse, based
  on the given glob pattern and options.
  
  @param  {String} `pattern`
  @param  {Object} `options`