This interface provides a convenient way of associating widgets with actions on a ApplicationWindow or Application.
It primarily consists of two properties: action_name and action_target. There are also some convenience APIs for setting these properties.
The action will be looked up in action groups that are found among the widgets ancestors. Most commonly, these will be the actions with the “win.” or “app.” prefix that are associated with the ApplicationWindow or Application, but other action groups that are added with insert_action_group will be consulted as well.