Expanded class hierarchy of StubFallbackPluginManager in Zircon Profile 8
- class \Drupal\Component\Plugin\PluginManagerBase implements PluginManagerInterface uses DiscoveryTrait
- class \Drupal\Core\Plugin\DefaultPluginManager implements CachedDiscoveryInterface, PluginManagerInterface uses DiscoveryCachedTrait, UseCacheBackendTrait
- class \Drupal\plugin_test\Plugin\MockBlockManager
- class \Drupal\plugin_test\Plugin\TestPluginManager
- class \Drupal\Tests\Component\Plugin\StubFallbackPluginManager implements FallbackPluginManagerInterface