class YarClient {

    public static void main(String[] args) throws Exception {<FILL_FUNCTION_BODY>}

}

        HttpYarClient yarClient = new HttpYarClient();
        String result = yarClient.call("http://127.0.0.1:8003/openapi/yarserver/test", "testString", String.class, "yar");
        System.out.println(result);
    
<no_super_class>