{{ form_start(form) }}
    <div class="form-group">
        <div class="mb-4">
        {{ form_label(form.nom) }}
        </div>
        <div>
        {{ form_widget(form.nom) }}
        </div>
        {{ form_errors(form.nom) }}
    </div>
    <div class="d-flex justify-content-end mt-4">
        <button class="btn btn-success">{{ button_label|default('Save') }}</button>
    </div>
{{ form_end(form) }}