public static String toJson(Object o) {
        return toJson(o, false);
    }
@Test
    void testBeanConversion() {
        SimplePojo pojo = new SimplePojo();
        String s = JsonUtils.toJson(pojo);
        Match.that(s).isEqualTo("{\"bar\":0,\"foo\":null}");
        Map<String, Object> map = Json.of(pojo).asMap();
        Match.that(map).isEqualTo("{ foo: null, bar: 0 }");
    }