Signal detail or null (default)
signal callback delegate or function to connect
void callback(string actionName, gio.action_group.ActionGroup actionGroup)
actionName the name of the action in action_group (optional)
actionGroup the instance the signal is connected to (optional)
Yes.After to execute callback after default handler, No.After to execute before (default)
Signal ID
Connect to ActionAdded signal.
Signals that a new action was just added to the group. This signal is emitted after the action has been added and is now visible.