Expanded class hierarchy of WidgetPluginManager

class \Drupal\Component\Plugin\PluginManagerBase implements CachedDiscoveryInterface, PluginManagerInterface
- class \Drupal\aggregator\Plugin\FetcherManager
- class \Drupal\Core\Entity\EntityManager
- class \Drupal\Core\TypedData\TypedDataManager
- class \Drupal\field\Plugin\Type\Formatter\FormatterPluginManager
- class \Drupal\field\Plugin\Type\Widget\WidgetPluginManager
- class \Drupal\layout\Plugin\Type\LayoutManager
- class \Drupal\plugin_test\Plugin\DefaultsTestPluginManager
- class \Drupal\plugin_test\Plugin\MockBlockManager
- class \Drupal\plugin_test\Plugin\TestPluginManager
- class \Drupal\rest\Plugin\Type\ResourcePluginManager
- class \Drupal\views\Plugin\Type\JoinManager
- class \Drupal\views\Plugin\Type\PluginManager
- class \Drupal\views\Plugin\Type\WizardManager