class FieldStorageConfigListBuilder

class FieldStorageConfigListBuilder extends ConfigEntityListBuilder {
  
  /**
   * An array of information about field types.
   *
   * @var array
   */
  protected $fieldTypes;
  
  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;
  
  /**
   * An array of entity bundle information.
   *
   * @var array
   */
  protected $bundles;
  
  /**
   * The field type manager.
   *
   * @var \Drupal\Core\Field\FieldTypePluginManagerInterface
   */
  protected $fieldTypeManager;
  
  /**
   * Constructs a new FieldStorageConfigListBuilder object.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type definition.
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Core\Field\FieldTypePluginManagerInterface $field_type_manager
   *   The 'field type' plugin manager.
   * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $bundle_info_service
   *   The bundle info service.
   */
  public function __construct(EntityTypeInterface $entity_type, EntityTypeManagerInterface $entity_type_manager, FieldTypePluginManagerInterface $field_type_manager, EntityTypeBundleInfoInterface $bundle_info_service) {
    parent::__construct($entity_type, $entity_type_manager->getStorage($entity_type->id()));
    $this->entityTypeManager = $entity_type_manager;
    $this->bundles = $bundle_info_service->getAllBundleInfo();
    $this->fieldTypeManager = $field_type_manager;
    $this->fieldTypes = $this->fieldTypeManager
      ->getDefinitions();
    $this->limit = FALSE;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
    return new static($entity_type, $container->get('entity_type.manager'), $container->get('plugin.manager.field.field_type'), $container->get('entity_type.bundle.info'));
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildHeader() {
    $header['id'] = $this->t('Field name');
    $header['entity_type'] = $this->t('Entity type');
    $header['type'] = [
      'data' => $this->t('Field type'),
      'class' => [
        RESPONSIVE_PRIORITY_MEDIUM,
      ],
    ];
    $header['usage'] = $this->t('Used in');
    return $header;
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildRow(EntityInterface $field_storage) {
    if ($field_storage->isLocked()) {
      $row['class'] = [
        'menu-disabled',
      ];
      $row['data']['id'] = $this->t('@field_name (Locked)', [
        '@field_name' => $field_storage->getName(),
      ]);
    }
    else {
      $row['data']['id'] = $field_storage->getName();
    }
    $entity_type_id = $field_storage->getTargetEntityTypeId();
    // Adding the entity type.
    $row['data']['entity_type'] = $entity_type_id;
    $field_type = $this->fieldTypes[$field_storage->getType()];
    $row['data']['type'] = $this->t('@type (module: @module)', [
      '@type' => $field_type['label'],
      '@module' => $field_type['provider'],
    ]);
    $usage = [];
    foreach ($field_storage->getBundles() as $bundle) {
      if ($route_info = FieldUI::getOverviewRouteInfo($entity_type_id, $bundle)) {
        $usage[] = Link::fromTextAndUrl($this->bundles[$entity_type_id][$bundle]['label'], $route_info)
          ->toRenderable();
      }
      else {
        $usage[] = $this->bundles[$entity_type_id][$bundle]['label'];
      }
    }
    $row['data']['usage']['data'] = [
      '#theme' => 'item_list',
      '#items' => $usage,
      '#context' => [
        'list_style' => 'comma-list',
      ],
    ];
    return $row;
  }

}