public MethodConfig setParameter(String key, String value) {
        if (parameters == null) {
            parameters = new ConcurrentHashMap<String, String>();
        }
        parameters.put(key, value);
        return this;
    }
@Test
    public void setParameter() throws Exception {
        MethodConfig methodConfig = new MethodConfig();
        Assert.assertNull(methodConfig.parameters);
        Assert.assertNull(methodConfig.getParameter("aa"));
        methodConfig.setName("echo");
        methodConfig.setParameter("aa", "11");
        Assert.assertNotNull(methodConfig.parameters);
        Assert.assertEquals(methodConfig.getParameter("aa"), "11");
    }