public FieldItemListInterface::__unset($property_name)

public FieldConfigStorage::__construct(EntityTypeInterface

public BaseFieldDefinition::setPropertyConstraints($name, array

public WidgetBase::errorElement(array $element, ConstraintViolationInterface

public FieldItemInterface::__isset($property_name)

protected FieldItemList::createItem($offset = 0, $value = NULL)

A class for defining entity fields. Hierarchy class \Drupal\Core\TypedData\

public FieldItemList::__get($property_name) Magic

public FieldItemList::__unset($property_name)

public FieldStorageDefinitionInterface