Properties order not applied on map keys

Property order is not working globally on the json object. forexample it's not working on map keys

public class Test {

    private static Jsonb jsonb;

    @BeforeAll
    public static void setUp() {
        JsonbConfig jbConf = new JsonbConfig().withPropertyOrderStrategy(PropertyOrderStrategy.LEXICOGRAPHICAL);
        jsonb = JsonbBuilder.newBuilder().withConfig(jbConf).build();
    }

    @Test
    public void propertyOrderTest() {

        Map<String, String> map = new HashMap<>();
        map.put("Alex", "alex@gmail.com");
        map.put("Jonas", "enrico@gmail.com");
        map.put("Benjamin", "fitz@gmail.com");
        map.put("Julie", "Julie@gmail.com");
        map.put("Soudeh", "soudeh@gmail.com");
        map.put("Pierre", "pierre@gmail.com");

        TestProperty prop = new TestProperty();
        prop.setMapMail(map);
        prop.setTime(OffsetDateTime.parse("2014-06-20T00:00:00.000+02:00"));
        assertEquals(
                "{\"mapMail\":{\"Alex\":\"alex@gmail.com\",\"Benjamin\":\"fitz@gmail.com\",\"Jonas\":\"enrico@gmail.com\",\"Julie\":\"Julie@gmail.com\",\"Pierre\":\"pierre@gmail.com\",\"Soudeh\":\"soudeh@gmail.com\"},\"time\":\"2014-06-20T00:00+02:00\"}",
                jsonb.toJson(prop));

    }

and the java Bean

class TestProperty {
        Map<String, String> mapMail;
        OffsetDateTime time;
    }

not sure it's a bug.

jansupol / jsonbapi

Properties order not applied on map keys #76