One entry in options: a plain option (string shorthand or SelectOption), an
inline SelectGroup, or a flyout SelectSubmenu. Discriminated by shape — an
options array is a group, a submenu array is a submenu, else it's an option.
(options / submenu are therefore reserved keys on an option object.)
One entry in
options: a plain option (string shorthand orSelectOption), an inlineSelectGroup, or a flyoutSelectSubmenu. Discriminated by shape — anoptionsarray is a group, asubmenuarray is a submenu, else it's an option. (options/submenuare therefore reserved keys on an option object.)