iggrid javascript change features enableRowNumbering code example

Example: iggrid sow row number column

<script type="text/javascript">
    $(function () {
        $("#grid").igGrid({
            autoGenerateColumns: true,
            dataSource: source,
            features: [
                {
                    name: 'RowSelectors', 
                    enableRowNumbering: true
                }
            ]
        });
    });
</script>