Sets the gtk.popover.Popover that will be popped up when the menu_button is clicked.
If popover is null, the button is disabled.
If propertyGtk.MenuButton:menu-model is set, the menu model is dissociated from the menu_button, and the property is set to null.
a gtk.popover.Popover, or null to unset and disable the button
Sets the gtk.popover.Popover that will be popped up when the menu_button is clicked.
If popover is null, the button is disabled.
If propertyGtk.MenuButton:menu-model is set, the menu model is dissociated from the menu_button, and the property is set to null.