code: public boolean tryDelegateRequest(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) {
  
          for (RequestDelegationService service : delegationServices) {
              if (canDelegate(service, request)) {
                  delegate(service, request, response, filterChain);
                  return true;
              }
          }
  
          return false;
      }
docs: Checks whether the request should be delegated to some of the registered {@link RequestDelegationService}s.