Expanded class hierarchy of FieldItemDataDefinition in Zircon Profile 8
- class \Drupal\Core\TypedData\DataDefinition implements \Drupal\Core\TypedData\ArrayAccess, DataDefinitionInterface
- class \Drupal\Core\Field\TypedData\FieldItemDataDefinition implements ComplexDataDefinitionInterface
- class \Drupal\Core\TypedData\ComplexDataDefinitionBase implements ComplexDataDefinitionInterface
- class \Drupal\Core\TypedData\DataReferenceDefinition implements DataReferenceDefinitionInterface
- class \Drupal\Core\TypedData\DataReferenceTargetDefinition
- class \Drupal\Core\TypedData\ListDataDefinition implements ListDataDefinitionInterface