code: function(cssClass) {
          for (var i=0, len=this.invalidHandleClasses.length; i<len; ++i) {
              if (this.invalidHandleClasses[i] == cssClass) {
                  delete this.invalidHandleClasses[i];
              }
          }
      }
docs: Unsets an invalid css class
  @method removeInvalidHandleClass
  @param {string} cssClass the class of the element(s) you wish to
  re-enable