SMART datagrid v.1 > Classes > ColumnHeader
Specify the way to display sorting order in column header in which has done sorting by SortOrderVisibility constant.
Defaults to SortOrderVisibility.INHERIT.
var header = column.header();
header.setSortOrderVisibility(DataLudi.SortOrderVisibility.HIDDEN);
column.setHeader({
sortOrderVisibility: "visible";
});