27.2 Format of the Menubar

A menubar is a list of menus, menu items, and strings. The format is similar to that of a menu, except:

• The first item need not be a string, and is not treated specially.
• A string consisting solely of hyphens is not treated specially.
• If an element of a menubar is nil, then it is used to represent the division between the set of menubar items which are flush-left and those which are flush-right. (Note: this isn't completely implemented yet.)