gtk/widget_since_3_8.go
func (v *Widget) IsVisible() bool {
	c := C.gtk_widget_is_visible(v.native())
	return gobool(c)
}
func (v *Widget) IsVisible() bool {
	c := C.gtk_widget_is_visible(v.native())
	return gobool(c)
}
/*
 * GtkWidget
 */
// IsVisible is a wrapper around gtk_widget_is_visible().