VersionNotFoundException example

  protected function loadRevision(EntityInterface $entity, $revision_id) {
    $storage = $this->entityTypeManager->getStorage($entity->getEntityTypeId());
    $revision = static::ensureVersionExists($storage->loadRevision($revision_id));
    if ($revision->id() !== $entity->id()) {
      throw new VersionNotFoundException(sprintf('The requested resource does not have a version with ID %s.', $revision_id));
    }
    return $revision;
  }

  /** * Helper method that ensures that a version exists. * * @param int|\Drupal\Core\Entity\EntityInterface $revision * A revision ID, or NULL if one was not found. * * @return int|\Drupal\Core\Entity\EntityInterface * A revision or revision ID, if one was found. * * @throws \Drupal\jsonapi\Revisions\VersionNotFoundException * Thrown if the given value is NULL, meaning the requested version was not * found. */