addCss to column of datatable

Webix JS
1

$$("datatable").addCss(columnID, "column-highlight");

I want to change the CSS of a specific column of a datatable, using the above code. I don’t get an error, but in the resulting html I don’t see the CSS class.

2

http://docs.webix.com/datatable__styling.html#columns

$$("datatable").getColumnConfig(columnID).css = "hlight";
$$("datatable").refresh();
3

It works now. However, I used refreshColumns() because refresh() didn’t apply the css.