code: public boolean isAccessTokenUsed (@Nullable final String sTokenString)
    {
      if (StringHelper.hasNoText (sTokenString))
        return false;
  
      return containsAny (x -> x.findFirstAccessToken (y -> y.getTokenString ().equals (sTokenString)) != null);
    }
docs: Check if the passed token string was already used in this application. This
  method considers all access token - revoked, expired or active.
  
  @param sTokenString
  The token string to check. May be <code>null</code>.
  @return <code>true</code> if the token string is already used.