Examples

        <%= toolbar id => 'my-toolbar',
                    groups => [
                        { buttons => [
                            ['Button 1'],
                            ['Button 2'],
                            ['Button 3'],
                          ],
                        },
                        { buttons => [
                            ['Button 4', primary],
                            ['Button 5'],
                            ['Button 6'],
                          ],
                        },
                    ]
        %>

        <div class="btn-toolbar" id="my-toolbar">
            <div class="btn-group">
                <button class="btn btn-default" type="button">Button 1</button>
                <button class="btn btn-default" type="button">Button 2</button>
                <button class="btn btn-default" type="button">Button 3</button>
            </div>
            <div class="btn-group">
                <button class="btn btn-primary" type="button">Button 4</button>
                <button class="btn btn-default" type="button">Button 5</button>
                <button class="btn btn-default" type="button">Button 6</button>
            </div>
        </div>