Expanded class hierarchy of LayoutInterface in Drupal 9
- interface \Drupal\Component\Plugin\PluginInspectionInterface; interface \Drupal\Component\Plugin\DerivativeInspectionInterface; interface \Drupal\Component\Plugin\ConfigurableInterface; interface \Drupal\Component\Plugin\DependentPluginInterface; interface \Drupal\Core\Plugin\ContextAwarePluginInterface
- interface \Drupal\Core\Layout\LayoutInterface