{% form_theme formDocument 'bootstrap_3_layout.html.twig' %}
<div class="panel panel-flat">

    <div class="panel-body">

        {{ form_row(formDocument.title, { 'attr': {'tabindex': '2'} }) }}
        {{ form_row(formDocument.typeDocument, { 'attr': {'tabindex': '3'} }) }}

        {{ form_row(formDocument.file, { 'attr': {'tabindex': '2'}}) }}

    </div>

</div>