The files/uris parameters for these functions can be NULL, so we need an
allow-none annotation here.
/**
* g_app_info_launch:
* @appinfo: a #GAppInfo
- * @files: (element-type GFile): a #GList of #GFile objects
+ * @files: (allow-none) (element-type GFile): a #GList of #GFile objects
* @launch_context: (allow-none): a #GAppLaunchContext or %NULL
* @error: a #GError
*
/**
* g_app_info_launch_uris:
* @appinfo: a #GAppInfo
- * @uris: (element-type utf8): a #GList containing URIs to launch.
+ * @uris: (allow-none) (element-type utf8): a #GList containing URIs to launch.
* @launch_context: (allow-none): a #GAppLaunchContext or %NULL
* @error: a #GError
*