docs: public int commandToDocType(String strCommand)
      {
          if (MessageLog.MESSAGE_SCREEN.equalsIgnoreCase(strCommand))
              return MessageLog.MESSAGE_SCREEN_MODE;
          if (MessageLog.SOURCE_SCREEN.equalsIgnoreCase(strCommand))
              return MessageLog.SOURCE_SCREEN_MODE;
          return super.commandToDocType(strCommand);
      }