Gtk.Widget.prototype.render_icon

function render_icon(stock_id:String, size:Number, detail:String):GdkPixbuf.Pixbuf {
    // Gjs wrapper for gtk_widget_render_icon()
}

A convenience function that uses the theme settings for widget to look up stock_id and render it to a pixbuf. stock_id should be a stock icon ID such as #GTK_STOCK_OPEN or #GTK_STOCK_OK. size should be a size such as #GTK_ICON_SIZE_MENU. detail should be a string that identifies the widget or code doing the rendering, so that theme engines can special-case rendering for that widget or code.

The pixels in the returned GdkPixbuf.Pixbuf are shared with the rest of the application and should not be modified. The pixbuf should be freed after use with GObject.unref.