Clear Selection of tree

Hello Webix team,
How to clear all selection of tree without using id?

You can use the tree.unselectAll() method:
https://docs.webix.com/api__link__ui.tree_unselectall.html

Thanks @Helga ,but it’s not working in my case

Can you share a snippet or any other kind of demo where the issue can be checked?
Do you have some selection related event handlers? ( if so, try to comment them )