code: public String[] get_object_property_list(Database database, String objname, String wildcard)
              throws DevFailed {
          if (!database.isAccess_checked()) checkAccess(database);
  
          String[] array = new String[2];
          array[0] = objname;
          array[1] = wildcard;
          DeviceData argIn = new DeviceData();
          argIn.insert(array);
          DeviceData argOut = command_inout(database, "DbGetPropertyList", argIn);
          return argOut.extractStringArray();
      }
docs: ==========================================================================