func (v *Window) GetFocus() (*Widget, error) {
	c := C.gtk_window_get_focus(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapWidget(glib.Take(unsafe.Pointer(c))), nil
}
func (v *Window) GetFocus() (*Widget, error) {
	c := C.gtk_window_get_focus(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapWidget(glib.Take(unsafe.Pointer(c))), nil
}
// GetFocus is a wrapper around gtk_window_get_focus().