{% for material in object.getMaterials() | filter(material => not material.getHide() and showDownloads|default(false)) %} <li class="list-group-item list-group-item-custom material"> <span class="glyphicon glyphicon-paperclip"></span> <a target="_blank" href="{{ material.getUrl() }}" title="{{ material.getName() }}"> {{ material.getName() }} </a> </li>{% endfor %}