Member variable XbpToolBarButtonMenuItem():index Foundation
Specifies the ordinal position of the menu item within the drop-down menu.
The :index instance variable contains a numeric value that can be read by an application to determine the ordinal position of a menu item. The ordinal position is a one-based value that can be used together with XbpToolBarButton:getItem() to get access to a specific XbpToolBarButtonMenuItem object. The menu items defined in a tool bar button's drop-down menu are numbered from top to bottom.
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