opencase/modules/opencase_entities/src/OCActivityTranslationHandler.php

<?php

namespace Drupal\opencase_entities;

use Drupal\content_translation\ContentTranslationHandler;

/**
 * Defines the translation handler for oc_activity.
 */
class OCActivityTranslationHandler extends ContentTranslationHandler {

  // Override here the needed methods from ContentTranslationHandler.

}