Expanded class hierarchy of LegacyDiscoveryDecorator

class \Drupal\field\Plugin\Type\LegacyDiscoveryDecorator implements DiscoveryInterface
- class \Drupal\field\Plugin\Type\Formatter\FormatterLegacyDiscoveryDecorator
- class \Drupal\field\Plugin\Type\Widget\WidgetLegacyDiscoveryDecorator