docs: public void delete(String statement,
                         Object parameter,
                         Class<? extends Entity> entityClass) {
          if (!bulkDeleteOperations.containsKey(entityClass)) {
              bulkDeleteOperations.put(entityClass,
                                       new ArrayList<BulkDeleteOperation>(1));
          }
          bulkDeleteOperations.get(entityClass).add(new BulkDeleteOperation(dbSqlSessionFactory.mapStatement(statement),
                                                                            parameter));
      }