data tree DOC mention lyd_owner_module works with opaque nodes
diff --git a/src/tree_data.h b/src/tree_data.h
index 133264a..65780d7 100644
--- a/src/tree_data.h
+++ b/src/tree_data.h
@@ -765,6 +765,8 @@
* @brief Get the owner module of the data node. It is the module of the top-level schema node. Generally,
* in case of augments it is the target module, recursively, otherwise it is the module where the data node is defined.
*
+ * Also works for opaque nodes, if it is possible to resolve the module.
+ *
* @param[in] node Data node to examine.
* @return Module owner of the node.
*/