code: @Deprecated
      public long getAccessExpires() {
          Session s = getSession();
          if (s != null) {
              return s.getExpirationDate().getTime();
          } else {
              return accessExpiresMillisecondsAfterEpoch;
          }
      }
docs: Retrieve the current session's expiration time (in milliseconds since
  Unix epoch), or 0 if the session doesn't expire or doesn't exist.
  
  @return long - session expiration time