code: func (v *Dialog) GetActionArea() (*Widget, error) {
  	c := C.gtk_dialog_get_action_area(v.native())
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	return wrapWidget(glib.Take(unsafe.Pointer(c))), nil
  }
docs: /*
   * GtkDialog
   */
  // GetActionArea() is a wrapper around gtk_dialog_get_action_area().