* (such as `/path/to/my icon.png`) without escaping
* if the #GFile for @icon is a native file. If the file is not
* native, the returned string is the result of g_file_get_uri()
- * (such as `sftp://path/to/my%20icon.png`).
+ * (such as `sftp://path/to/my%20icon.png`).
*
* - If @icon is a #GThemedIcon with exactly one name, the encoding is
* simply the name (such as `network-server`).
*
* Virtual: to_tokens
- * Returns: An allocated NUL-terminated UTF8 string or %NULL if @icon can't
- * be serialized. Use g_free() to free.
+ * Returns: (nullable): An allocated NUL-terminated UTF8 string or
+ * %NULL if @icon can't be serialized. Use g_free() to free.
*
* Since: 2.20
*/