$table = new html_table();

$table->head = array('Name', 'Actions');

$row = new html_table_row(array('Item #1', 'Example'));

$row->attributes['data-id'] = '1';

$table->data[] = $row;

$row = new html_table_row(array('Item #2', 'Example'));

$row->attributes['data-id'] = '2';

$row->attributes['data-parentid'] = '1';

$table->data[] = $row;

echo html_writer::table($table);

<table class="generaltable">

    <thead>

        <tr>

            <th class="header c0" style="" scope="col">Name</th>

            <th class="header c1 lastcol" style="" scope="col">Actions</th>

        </tr>

    </thead>

    <tbody>

        <tr class="r0">

            <td class="cell c0" style="">Item #1</td>

            <td class="cell c1 lastcol" style="">Example</td>

        </tr>

        <tr class="r1 lastrow">

            <td class="cell c0" style="">Item #2</td>

            <td class="cell c1 lastcol" style="">Example</td>

        </tr>

    </tbody>

</table>

<table class="generaltable">

    <thead>

        <tr>

            <th class="header c0" style="" scope="col">Name</th>

            <th class="header c1 lastcol" style="" scope="col">Actions</th>

        </tr>

    </thead>

    <tbody>

        <tr class=" r0" data-id="1">

            <td class="cell c0" style="">Item #1</td>

            <td class="cell c1 lastcol" style="">Example</td>

        </tr>

        <tr class=" r1 lastrow" data-id="2" data-parentid="1">

            <td class="cell c0" style="">Item #2</td>

            <td class="cell c1 lastcol" style="">Example</td>

        </tr>

    </tbody>

</table>