*
* @callback: function pointer to call
* @depends: struct bt_dependency detailing the required computation results.
- * Ends with 0.
+ * Ends with 0. NULL is accepted as empty dependency.
* @weak_depends: struct bt_dependency detailing the optional computation
* results that can be optionally consumed by this
- * callback.
+ * callback. NULL is accepted as empty dependency.
* @provides: struct bt_dependency detailing the computation results
* provided by this callback.
- * Ends with 0.
+ * Ends with 0. NULL is accepted as empty dependency.
*
* "depends", "weak_depends" and "provides" memory is handled by the
* babeltrace library after this call succeeds or fails. These objects