Expanded class hierarchy of FieldItemListInterface in Drupal 9
- interface \Drupal\Core\TypedData\ListInterface extends \Drupal\Core\TypedData\ArrayAccess \Drupal\Core\TypedData\Countable; interface \Drupal\Core\Access\AccessibleInterface
- interface \Drupal\Core\Field\FieldItemListInterface
- interface \Drupal\Core\Field\EntityReferenceFieldItemListInterface
- interface \Drupal\Core\Field\FieldItemListInterface