public function deleteImportedContent() {
    $uuids = $this->state->get('govcms8_default_content_uuids', []);
    $by_entity_type = array_reduce(array_keys($uuids), function ($carry, $uuid) use ($uuids) {
      $entity_type_id = $uuids[$uuid];
      $carry[$entity_type_id][] = $uuid;
      return $carry;
    }, []);
    foreach ($by_entity_type as $entity_type_id => $entity_uuids) {
      $storage = $this->entityTypeManager->getStorage($entity_type_id);
      $entities = $storage->loadByProperties(['uuid' => $entity_uuids]);
      $storage->delete($entities);
    }
    return $this;
  }