One useful application of this interface is to map the names of actions from various action groups to unique, prefixed names (e.g. by prepending "app." or "win."). This is the motivation for the 'Map' part of the interface name.
Adds an action to the action_map.
Get the main Gtk struct
Looks up the action with the name action_name in action_map.
Removes the named action from the action map.