Définition via 'Configuration'
{% apply spaceless %}{% verbatim %} 
            // config/packages/oka-lists.yaml
oka-lists:
  default_body_extra_class: "oka-surface -system -medium"

  lists_config:
    person_list:
        body_extra_class: "oka-surface -system -medium"
{% endverbatim %}{% endapply %}
Définition via 'Controller'
{% apply spaceless %}{% verbatim %} 
            $list = $this->listsFactory->createListFromRequest(ListsBundle\Wrapper\ArrayList::class, $request, 'person_list', $data)
    ->withBodyExtraClass("oka-surface -system -medium")
    ->build();
{% endverbatim %}{% endapply %}