code: public void saveToken(CsrfToken t, HttpServletRequest request, HttpServletResponse response) {
  		String ident = getIdentifierFromCookie(request);
  		if (ident != null) {
  			String key = ident.concat(parameterName);
  			CsrfToken token = loadToken(request);
  			if (token == null) {
  				token = generateToken(null);
  				if (Config.isCacheEnabled()) {
  					cache.put(Config.getRootAppIdentifier(), key, token, (long) Config.SESSION_TIMEOUT_SEC);
  				} else {
  					localCache.put(key, new Object[]{token, System.currentTimeMillis()});
  				}
  			}
  			storeTokenAsCookie(token, request, response);
  		}
  	}
docs: Saves a CSRF token in cache.
  @param t (ignored)
  @param request HTTP request
  @param response HTTP response