The Menu object also contains an attribute called items whose value can be one or more MenuItem objects.
Menu对象还包含一个名为items的属性，该属性的值可以是一个或多个MenuItem对象。
The Menu object has a text attribute whose value is a String representing the title of the menu to be displayed — File in this case.
Menu对象有一个text属性，该属性的值是一个String，表示要显示的菜单的标题 —本例为File。
The Menu object has a text attribute whose value is a String representing the title of the menu to be displayed — File in this case.
Menu对象有一个text属性，该属性的值是一个String，表示要显示的菜单的标题 —本例为File。
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