public static WidgetBase::getWidgetState(array $parents, $field_name, FormStateInterface

public FormatterInterface::prepareView(array $entities_items)

protected WidgetBase::formSingleElement(FieldItemListInterface $items, $delta

protected WidgetBase::getFieldSetting($setting_name)

protected FieldStorageConfigStorage::mapTo

Field-type specific settings. An array of key/value pairs, The keys and default values are defined by the field type.

public FieldItemListInterface::preSave()

Name of the event triggered for field storage definition creation. This event allows you to respond to the creation of a new field storage definition

public FieldItemBase::__set($name, $value) Magic