Sets the icon for applications that are launched with this context.
The @icon_name will be interpreted in the same way as the Icon field
in desktop files. See also [method@Gdk.AppLaunchContext.set_icon()].
If both @icon and @icon_name are set, the @icon_name takes priority.
If neither @icon or @icon_name is set, the icon is taken from either
the file that is passed to launched application or from the GAppInfo
for the launched application itself.
Sets the icon for applications that are launched with this context.
The @icon_name will be interpreted in the same way as the Icon field in desktop files. See also [method@Gdk.AppLaunchContext.set_icon()].
If both @icon and @icon_name are set, the @icon_name takes priority. If neither @icon or @icon_name is set, the icon is taken from either the file that is passed to launched application or from the GAppInfo for the launched application itself.