Treetable new row

I have editable treetable and i need to add new empty row to some branch. How can i do it?

You can use the add method:

treetable.add({id:webix.uid(), value:""}, -1, "1" );

where-1 specifies the item position and "1" is the ID of the parent branch. Check the snippet:

http://webix.com/snippet/f87f44f8