gtk:icon-set-render-icon-pixbuf (iconset context size)

iconset -- a gtk:icon-set instance
context -- a gtk:style-context object
size -- a gtk:icon-size value, a size of -1 means render at the size of the source and do not scale

The gdk-pixbuf:pixbuf object to be displayed.

Renders an icon using the gtk:render-icon-pixbuf function. In most cases, the gtk:widget-render-icon-pixbuf function is better, since it automatically provides most of the arguments from the current widget settings. This function never returns nil. If the icon cannot be rendered, perhaps because an image file fails to load, a default "missing image" icon will be returned instead. The gtk:icon-set-render-icon-pixbuf function has been deprecated since version 3.10 and should not be used in newly written code. Use the gtk:icon-theme API instead.