{{ form_start(form, {attr: {id: 'form'}}) }}

    <div class="group-form row">
        <div class="col-12">
            {{ form_row(form.name) }}
        </div>
    </div>
    {{ form_widget(form) }}
    <button class="btn btn-add">{{ button_label|default('Valider') }}</button>
{{ form_end(form) }}