SMART datagrid v.1 > Classes > ColumnGroup
Return the first DataColumn connected to DataField which has the same field name as parameter fieldName. If not exist, it will return null.
var group = grid.focusedIndex().group();
if (group) {
var col = group.columnByField('fldName');
if (col) {
col.styles().setBackground('#30ff0000');
}
}