* possible for an action to be removed and for a new action to be added
* with the same name but a different parameter type.
*
- * Return value: the parameter type
+ * Returns: (nullable): the parameter type
*
* Since: 2.28
**/
* possible for an action to be removed and for a new action to be added
* with the same name but a different state type.
*
- * Returns: (transfer full): the state type, if the action is stateful
+ * Returns: (nullable) (transfer full): the state type, if the action
+ * is stateful
*
* Since: 2.28
**/
* The return value (if non-%NULL) should be freed with
* g_variant_unref() when it is no longer required.
*
- * Return value: (transfer full): the state range hint
+ * Returns: (nullable) (transfer full): the state range hint
*
* Since: 2.28
**/
* An action must be enabled in order to be activated or in order to
* have its state changed from outside callers.
*
- * Return value: whether or not the action is currently enabled
+ * Returns: whether or not the action is currently enabled
*
* Since: 2.28
**/
* The return value (if non-%NULL) should be freed with
* g_variant_unref() when it is no longer required.
*
- * Return value: (allow-none): the current state of the action
+ * Returns: (nullable): the current state of the action
*
* Since: 2.28
**/