Drupal 8 - Entité - Champ de base «Liste d'entiers»

    $fields['photos_number'] = BaseFieldDefinition::create('list_integer')
      ->setLabel(t('Nombre de photos autorisées'))
      ->setRequired(TRUE)
      ->setSettings(array(
        'allowed_values' => [
          1 => t('1 photo'),
          2 => t('2 photos'),
          3 => t('3 photos'),
        ],
      ))
      ->setDefaultValue('public')
      ->setDisplayOptions('form', array(
        'type' => 'options_buttons',
      ))
      ->setDisplayConfigurable('form', TRUE)
      ->setDisplayConfigurable('view', FALSE);