From Grouped TreeTable Get element ID when user ckick "+" (open sub elements)

Hello!
I have TreeTable, and I want know, which element, user opened …

I want make logic like :

When user opening grouped element, other groups wil be hide, when user close active group, other groups will be show

https://docs.webix.com/api__link__ui.treetable_onafterclose_event.html
https://docs.webix.com/api__link__ui.treetable_onafteropen_event.html
https://docs.webix.com/api__link__ui.treetable_openall.html
https://docs.webix.com/api__link__ui.treetable_closeall.html