code: private static String getListInstanceHash(HttpServletRequest request) {
  
          String result;
          if ((request != null) && (request.getSession(false) != null)) {
              result = "_" + String.valueOf(request.getSession(false).getId().hashCode());
  
          } else {
              result = "";
          }
          return result;
      }
docs: Gets the hash which is appended to the list name to form the list id.<p>
  
  @param request the current request
  @return the list instance hash