code: func ImageNewFromStock(stock Stock, size IconSize) (*Image, error) {
  	cstr := C.CString(string(stock))
  	defer C.free(unsafe.Pointer(cstr))
  	c := C.gtk_image_new_from_stock((*C.gchar)(cstr), C.GtkIconSize(size))
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	return wrapImage(glib.Take(unsafe.Pointer(c))), nil
  }
docs: // ImageNewFromStock is a wrapper around gtk_image_new_from_stock().