[ Version ( since = "2.18" ) ]
public void add_action_widget (Widget child, int response_id)
Add an activatable widget to the action area of a `GtkInfoBar`.
This also connects a signal handler that will emit the [signal@Gtk.InfoBar:GtkInfoBar:response] signal on the message area
when the widget is activated. The widget is appended to the end of the message areas action area.
| this |
a `GtkInfoBar` |
| child |
an activatable widget |
| response_id |
response ID for |