public AbstractJettyServiceBuilder customizer(Consumer<? super Server> customizer) {
        customizers.add(requireNonNull(customizer, "customizer"));
        return this;
    }
Adds a {@link Consumer} that performs additional configuration operations against
the Jetty {@link Server} created by a {@link JettyService}.
jetty/jetty11/src/main/java/com/linecorp/armeria/server/jetty/AbstractJettyServiceBuilder.java