gtk/window.go
func (v *Window) GetDefaultWidget() *Widget {
	c := C.gtk_window_get_default_widget(v.native())
	if c == nil {
		return nil
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapWidget(obj)
}
func (v *Window) GetDefaultWidget() *Widget {
	c := C.gtk_window_get_default_widget(v.native())
	if c == nil {
		return nil
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapWidget(obj)
}
// GetDefaultWidget is a wrapper around gtk_window_get_default_widget().