private void setServerOptions(final Builder builder) {
   val serverOptions = kikahaConf.config().getConfig("server.undertow.server-options");
   for (val entry : serverOptions.entrySet()) {
     val option = getConfigOption(entry.getValue(), entry.getKey());
     if (option != null) builder.setServerOption(option.getOption(), option.getValue());
   }
 }