gtk-icon-theme-lookup-by-gicon (theme icon size flags)

theme -- a gtk-icon-theme object
icon -- the g-icon object to look up
size -- an integer with the desired icon size
flags -- a gtk-icon-lookup-flags value modifying the behavior of the icon lookup

A gtk-icon-info instance containing information about the icon, or nil if the icon was not found.

Looks up an icon and returns a gtk-icon-info instance containing information such as the filename of the icon. The icon can then be rendered into a pixbuf using the gtk-icon-info-load-icon function.