docs: @Deprecated
      public Map<RequestMatcher, List<PortletFilter>> getFilterChainMap() {
          LinkedHashMap<RequestMatcher, List<PortletFilter>> map =  new LinkedHashMap<RequestMatcher, List<PortletFilter>>();
  
          for (PortletSecurityFilterChain chain : filterChains) {
              map.put(((DefaultPortletSecurityFilterChain)chain).getRequestMatcher(), chain.getFilters());
          }
  
          return map;
      }