code: function ($obj, propertyNames) {
        if (agent.jqueryVersion < 1.9) {
          var result = {};
          $.each(propertyNames, function (idx, propertyName) {
            result[propertyName] = $obj.css(propertyName);
          });
          return result;
        }
        return $obj.css.call($obj, propertyNames);
      }
docs: @method jQueryCSS
  
  [workaround] for old jQuery
  passing an array of style properties to .css()
  will result in an object of property-value pairs.
  (compability with version < 1.9)
  
  @private
  @param  {jQuery} $obj
  @param  {Array} propertyNames - An array of one or more CSS properties.
  @return {Object}