docs: @SuppressWarnings("unchecked")
      private boolean isAnySecureTransportAddressAvailable(Map<String, Object> extraConfig) {
          Map<String, List<TransportAddress>> addrMap = (Map<String, List<TransportAddress>>) extraConfig.get(ADDR_KEY);
          if (addrMap != null) {
              Set<String> sslAliases = addrMap.keySet();
              return sslAliases.size() != 1;
          }
          return true;
      }