namespace Drupal\Core\Entity\Field

Classsort descending Location Description
FieldInterface drupal/core/lib/Drupal/Core/Entity/Field/FieldInterface.php Interface for fields, being lists of field items.
FieldItemBase drupal/core/lib/Drupal/Core/Entity/Field/FieldItemBase.php An entity field item.
FieldItemInterface drupal/core/lib/Drupal/Core/Entity/Field/FieldItemInterface.php Interface for entity field items, which are complex data objects containing the values.