解决AntDesignSubMenu渲染时出现的TypeError

// 当 props.parentMenu 不存在时，尝试访问其 isRootMenu 属性会导致错误

var getPopupCOntainer= props.parentMenu && props.parentMenu.isRootMenu ? props.parentMenu.props.getPopupContainer : function (triggerNode) {
return triggerNode.parentNode;
};

SubMenu.prototype.renderChildren = function renderChildren(children) {
var props = this.props;
var baseProps = {
mode: props.mode === 'horizontal' ? 'vertical' : props.mode,
visible: this.props.isOpen,
level: props.level + 1,
inlineIndent: props.inlineIndent,
focusable: false,
onClick: this.onSubMenuClick,
onSelect: this.onSelect,
onDeselect: this.onDeselect,
onDestroy: this.onDestroy,
selectedKeys: props.selectedKeys,
eventKey: props.eventKey + '-menu-',
openKeys: props.openKeys,
openTransitionName: props.openTransitionName,
openAnimation: props.openAnimation,
onOpenChange: this.onOpenChange,
subMenuOpenDelay: props.subMenuOpenDelay,
parentMenu: this, // 确保 parentMenu 存在且 isRootMenu 设置正确
subMenuCloseDelay: props.subMenuCloseDelay,
forceSubMenuRender: props.forceSubMenuRender,
triggerSubMenuAction: props.triggerSubMenuAction,
builtinPlacements: props.builtinPlacements,
defaultActiveFirst: props.store.getState().defaultActiveFirst[(0, _util.getMenuIdFromSubMenuEventKey)(props.eventKey)],
multiple: props.multiple,
prefixCls: props.rootPrefixCls,
id: this._menuId,
manualRef: this.saveMenuInstance,
itemIcon: props.itemIcon,
expandIcon: props.expandIcon
};
};