public MethodDescriptor getMethod(String methodName, String params) {
        Map<String, MethodDescriptor> methods = descToMethods.get(methodName);
        if (CollectionUtils.isNotEmptyMap(methods)) {
            return methods.get(params);
        }
        return null;
    }
@Test
    void getMethod() {
        String desc = ReflectUtils.getDesc(String.class);
        Assertions.assertNotNull(service.getMethod("sayHello", desc));
    }