code: public OqlBuilder<T> orderBy(final List<Order> orders) {
      if (null != orders) {
        if (isNotEmpty(statement)) { throw new RuntimeException("cannot add order by to a exists statement."); }
        this.orders.addAll(orders);
      }
      return this;
    }
docs: orderBy.
  
  @param orders a {@link java.util.List} object.
  @return a {@link org.beangle.commons.dao.query.builder.OqlBuilder} object.