code: public void put_class_attribute_property(Database database, String classname, DbAttribute[] attr)
              throws DevFailed {
          if (!database.isAccess_checked()) checkAccess(database);
  
          DeviceData argIn = new DeviceData();
          argIn.insert(ApiUtil.toStringArray(classname, attr, 2));
          command_inout(database, "DbPutClassAttributeProperty2", argIn);
      }
docs: ==========================================================================