Gtk.Action:icon-name
"icon-name" String : Read / Write
The name of the icon from the icon theme.
Note that the stock icon is preferred, if the Gtk.stock-id property holds the id of an existing stock icon, and the Gio.Icon is preferred if the Gtk.Action:gicon property is set.
This is an appearance property and thus only applies if Gtk.use-action-appearance is true.
Since 2.10