public JettyServiceBuilder handlerWrapper(HandlerWrapper handlerWrapper) {
        handlerWrappers.add(requireNonNull(handlerWrapper, "handlerWrapper"));
        return this;
    }
Adds the specified {@link HandlerWrapper} to the Jetty {@link Server}.

@see Server#insertHandler(HandlerWrapper)
jetty/jetty9/src/main/java/com/linecorp/armeria/server/jetty/JettyServiceBuilder.java