public String getType() {
        return type;
    }
@Test
    void testDeserialize() throws JsonProcessingException {
        String json = "{\"resultCode\":200,\"errorCode\":0,\"type\":\"deregisterInstance\",\"success\":true}";
        InstanceResponse response = mapper.readValue(json, InstanceResponse.class);
        assertEquals(NamingRemoteConstants.DE_REGISTER_INSTANCE, response.getType());
    }