gdk:app-launch-context-set-icon-name (context name)

context -- a gdk:app-launch-context object
name -- a string with an icon name, or nil

Sets the icon for applications that are launched with the launch context. The icon name will be interpreted in the same way as the icon field in desktop files. See also the gdk:app-launch-context-set-icon function. If both an icon and an icon name are set, the icon name takes priority. If neither an icon or an icon name is set, the icon is taken from either the file that is passed to launched application or from the g:app-info object for the launched application itself.