GtkPopoverMenu is a subclass of gtk.Popover that treats its children like menus and allows switching between them. It is meant to be used primarily together with gtk.ModelButton, but any widget can be used, such as gtk.SpinButton or gtk.Scale In this respect, GtkPopoverMenu is more flexible than popovers that are created from a gio.MenuModel with Popover.newFromModel.
Undocumented in source.