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 ActionRemoved signal.
Signals that an action is just about to be removed from the group. This signal is emitted before the action is removed, so the action is still visible and can be queried from the signal handler.