menu.item.id matches the string passed to
gtkToolItemSetProxyMenuItem return the corresponding GtkMenuItem.gtkToolItemGetProxyMenuItem(object, menu.item.id)objectmenu.item.idGtkWidget] The GtkMenuItem passed to
gtkToolItemSetProxyMenuItem, if the menu.item.ids match.GtkToolItem should use this function to update
their menu item when the GtkToolItem changes. That the
menu.item.ids must match ensures that a GtkToolItem will not
inadvertently change a menu item that they did not create.
Since 2.4