All classes that implement EntityViewDisplayInterface in Drupal 9
- class \Drupal\Core\Entity\Entity\EntityViewDisplay implements EntityViewDisplayInterface
- class \Drupal\field_layout\Entity\FieldLayoutEntityViewDisplay implements EntityDisplayWithLayoutInterface uses FieldLayoutEntityDisplayTrait
- class \Drupal\layout_builder\Entity\LayoutBuilderEntityViewDisplay implements LayoutEntityDisplayInterface uses LayoutEntityHelperTrait, SectionListTrait