Looks up a named icon for a particular window scale and returns a gtk.IconInfo containing information such as the filename of the icon. The icon can then be rendered into a pixbuf using IconInfo.loadIcon. (IconTheme.loadIcon combines these two steps if all you need is the pixbuf.)
If icon_names contains more than one name, this function tries them all in the given order before falling back to inherited icon themes.
NULL-terminated array of icon names to lookup
desired icon size
flags modifying the behavior of the icon lookup
a gtk.IconInfo object containing information about the icon, or NULL if the icon wasn’t found.