generateNewEntityLabel example

$previous_revision_id = $this->previousRevisionId[$active_langcode];
      $previous_untranslatable_field_value = $this->previousUntranslatableFieldValue[$previous_untranslatable_field_langcode];
    }

    // Check that after instantiating a new revision for the specified     // translation, we are resuming work from where we left the last time. If     // that is the case, the label generated for the previous revision should     // match the stored one.     if (!$entity->isNew()) {
      $previous_label = NULL;
      if (!$entity->isNewTranslation()) {
        $previous_label = $this->generateNewEntityLabel($entity, $previous_revision_id);
        $latest_affected_revision_id = $this->storage->getLatestTranslationAffectedRevisionId($entity->id(), $entity->language()->getId());
      }
      else {
        // Normally it would make sense to load the default revision in this         // case, however that would mean simulating here the logic that we need         // to test, thus "masking" possible flaws. To avoid that, we simply         // pretend we are starting from an earlier non translated revision.         // This ensures that the we can check that the merging logic is applied         // also when adding a new translation.         $latest_affected_revision_id = 1;
      }