code: public void delete_class_attribute_property(Database database, String name, String attname, String[] propnames)
              throws DevFailed {
          if (!database.isAccess_checked()) checkAccess(database);
  
          String[] array = new String[2 + propnames.length];
          array[0] = name;
          array[1] = attname;
          System.arraycopy(propnames, 0, array, 2, propnames.length);
  
          DeviceData argIn = new DeviceData();
          argIn.insert(array);
          command_inout(database, "DbDeleteClassAttributeProperty", argIn);
      }
docs: ==========================================================================