Sets the title string for the menu.
The title is displayed when the menu is shown as a tearoff menu. If @title is %NULL, the menu will see if it is attached to a parent menu item, and if so it will try to use the same text as that menu item’s label.
a string containing the title for the menu, or %NULL to inherit the title of the parent menu item, if any
See Implementation
Sets the title string for the menu.
The title is displayed when the menu is shown as a tearoff menu. If @title is %NULL, the menu will see if it is attached to a parent menu item, and if so it will try to use the same text as that menu item’s label.