@Override
    public JettyServiceBuilder requestLog(RequestLog requestLog) {
        return (JettyServiceBuilder) super.requestLog(requestLog);
    }
Adds the specified {@link Handler.Wrapper} to the Jetty {@link Server}.

@see Server#insertHandler(Singleton)
jetty/jetty12/src/main/java/com/linecorp/armeria/server/jetty/JettyServiceBuilder.java