* @max: the maximum value of the scale (usually 100)
* @step: the stepping of value when a scroll-wheel event,
* or up/down arrow event occurs (usually 2)
- * @icons: a %NULL-terminated array of icon names, or %NULL if
+ * @icons: (allow-none): a %NULL-terminated array of icon names, or %NULL if
* you want to set the list later with gtk_scale_button_set_icons()
*
* Creates a #GtkScaleButton, with a range between @min and @max, with