/**
* gst_type_find_register:
- * @plugin: A #GstPlugin, or NULL for a static typefind function
+ * @plugin: (allow-none): A #GstPlugin, or NULL for a static typefind function
* @name: The name for registering
* @rank: The rank (or importance) of this typefind function
* @func: The #GstTypeFindFunction to use
* @find: The #GstTypeFind object the function was called with
* @probability: The probability in percent that the suggestion is right
* @media_type: the media type of the suggested caps
- * @fieldname: first field of the suggested caps, or NULL
+ * @fieldname: (allow-none): first field of the suggested caps, or NULL
* @...: additional arguments to the suggested caps in the same format as the
* arguments passed to gst_structure_new() (ie. triplets of field name,
* field GType and field value)