Hello Victor,
Thanks for your answer. I'm using this method already, but the problem is that the hierarchy is changing all the time (it's HR organizational hierarchy).
That's why filter by inputstring method is not the appropriate
If there isn't possibility to configure like open_hierarchy_nodes_visible method in Webapp, I hope Sap can develop it as soon as possible for DS.
Should I write to OSS or to Idea place? What do you think?