docs: private void updateDeletedObjectsThroughEntityManager(List<String> oids, Long timestamp) {
          for (String id : oids) {
              EDBObject o = new EDBObject(id);
              o.updateTimestamp(timestamp);
              o.setDeleted(true);
              JPAObject j = EDBUtils.convertEDBObjectToJPAObject(o);
              entityManager.persist(j);
          }
      }