docs: protected void configureCasClient(final Collection<BaseClient> properties) {
          val index = new AtomicInteger();
          pac4jProperties.getCas()
              .stream()
              .filter(cas -> StringUtils.isNotBlank(cas.getLoginUrl()))
              .forEach(cas -> {
                  val cfg = new CasConfiguration(cas.getLoginUrl(), CasProtocol.valueOf(cas.getProtocol()));
                  cfg.setLogoutHandler(casServerSpecificLogoutHandler);
                  val client = new CasClient(cfg);
  
                  val count = index.intValue();
                  if (StringUtils.isBlank(cas.getClientName())) {
                      client.setName(client.getClass().getSimpleName() + count);
                  }
                  client.setCallbackUrlResolver(new PathParameterCallbackUrlResolver());
                  configureClient(client, cas);
  
                  index.incrementAndGet();
                  LOGGER.debug("Created client [{}]", client);
                  properties.add(client);
              });
      }