SMART datagrid v.1 > Classes > ColumnGroup
Return next Column object of column specified by parameter. If it is the column not being included or displayed in this group, or it is the last column, it will return null.
var idx = grid.focusedIndex();
var col = idx.column();
if (col && col.group()) {
col = col.group().next();
if (col) {
grid.setFocusedIndex(grid.getIndex(idx.I(), col);
}
}