*
* Peek the head element of the queue without removing it from the queue.
*
- * Returns: the head element of @queue or NULL when the queue is empty.
+ * Returns: (transfer none): the head element of @queue or NULL when
+ * the queue is empty.
*
* Since: 0.10.33
*/
*
* Get the head element of the queue.
*
- * Returns: the head element of @queue or NULL when the queue is empty.
+ * Returns: (transfer full): the head element of @queue or NULL when
+ * the queue is empty.
*
* Since: 0.10.33
*/