gtk/gtk.go
func ToolButtonNew(iconWidget IWidget, label string) (*ToolButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	w := nullableWidget(iconWidget)
	c := C.gtk_tool_button_new(w, (*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapToolButton(glib.Take(unsafe.Pointer(c))), nil
}
func ToolButtonNew(iconWidget IWidget, label string) (*ToolButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	w := nullableWidget(iconWidget)
	c := C.gtk_tool_button_new(w, (*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapToolButton(glib.Take(unsafe.Pointer(c))), nil
}
// ToolButtonNew is a wrapper around gtk_tool_button_new().