docs: public String getUserName()
      {
          String strUserName = null;
          Record recUserInfo = (Record)this.getUserInfo();
          if (recUserInfo != null)
              strUserName = recUserInfo.getField(UserInfoModel.USER_NAME).toString();
          if ((strUserName == null) || (strUserName.length() == 0))
              strUserName = super.getUserName();
          return strUserName;
      }