Events for treecheckbox

How to enable events for treecheckbox (treetable)?

code:
on:{ onCheck:function(id, column, state) {

}
does not work…

How?

You need to use onItemCheck event
http://docs.webix.com/api__link__ui.treetable_onitemcheck_event.html
http://webix.com/snippet/9a5eb356

thank you !