* @chooser: a #GtkFileChooser
* @id: id for the added choice
* @label: user-visible label for the added choice
- * @options: ids for the options of the choice, or %NULL for a boolean choice
- * @option_labels: user-visible labels for the options, must be the same length as @options
+ * @options: (nullable) (array zero-terminated=1): ids for the options of the choice, or %NULL for a boolean choice
+ * @option_labels: (nullable) (array zero-terminated=1): user-visible labels for the options, must be the same length as @options
*
* Adds a 'choice' to the file chooser. This is typically implemented
* as a combobox or, for boolean choices, as a checkbutton. You can select