All classes that implement WebformSubmissionInterface in Webform 8.5
- class \Drupal\webform\Entity\WebformSubmission implements WebformSubmissionInterface uses EntityChangedTrait, StringTranslationTrait
- class \Drupal\webform_revisions\Entity\WebformRevisionsSubmission
- class \Drupal\webform_revisions\Entity\WebformRevisionsSubmission