code: function (store, type, fixture) {
      var now = (new Date()).toISOString(), attributes = slice.call(arguments, 3);
      this._parseModelOrType(store, type).eachAttribute(function (name, meta) {
        if (attributes.indexOf(name) !== -1 && (!meta.type || meta.type === 'date')) {
          fixture[name] = now;
        }
      });
    }
docs: Update the date of the fixture at given attribute(s) to now (if the attribute is defined in the model)
  
  @method _touchDateAttr
  @param {DS.Store} store
  @param {subclass of DS.Model|string} type
  @param {Object} fixture
  @param {string} attributes...