How I can Group a Tree in 2 Levels? I expected the possibility to use an array to the scheme or group function. But this do not work. Any hint?
ok, if this is available please get me a note. Currently I have written my own JSON generator for tree levels. This also work on filtered dataset.
The component rocks…no limits 
Hello,
The group method can create only one level at a time, but it is possible to call it several times considering the result of the previously applied grouping.
Please, check: https://snippet.webix.com/0bkmcs07