code: function (type, args, obj) {
  
              var height = args[0],
                  el = this.element;
  
              Dom.setStyle(el, "height", height);
              this.cfg.refireEvent("iframe");
          }
docs: The default event handler fired when the "height" property is changed.
  @method configHeight
  @param {String} type The CustomEvent type (usually the property name)
  @param {Object[]} args The CustomEvent arguments. For configuration
  handlers, args[0] will equal the newly applied value for the property.
  @param {Object} obj The scope object. For configuration handlers,
  this will usually equal the owner.