All classes that implement WebformElementComputedInterface in Webform 8.5
- class \Drupal\webform\Plugin\WebformElement\WebformComputedBase implements WebformElementComputedInterface, WebformElementDisplayOnInterface uses WebformDisplayOnTrait
- class \Drupal\webform\Plugin\WebformElement\WebformComputedToken
- class \Drupal\webform\Plugin\WebformElement\WebformComputedTwig