Sets the GMenuModel from which the popup will be constructed.
If @menu_model is %NULL, the button is disabled.
A [class@Gtk.Popover] will be created from the menu model with
[ctor@Gtk.PopoverMenu.new_from_model]. Actions will be connected
as documented for this function.
If [property@Gtk.MenuButton:popover] is already set, it will be
dissociated from the @menu_button, and the property is set to %NULL.
Sets the GMenuModel from which the popup will be constructed.
If @menu_model is %NULL, the button is disabled.
A [class@Gtk.Popover] will be created from the menu model with [ctor@Gtk.PopoverMenu.new_from_model]. Actions will be connected as documented for this function.
If [property@Gtk.MenuButton:popover] is already set, it will be dissociated from the @menu_button, and the property is set to %NULL.