@Test
public void testMap() {

    Map<String, Object> map = new HashMap<>();
    map.put("externalId", "{\"taskRefName\":\"t001\",\"workflowId\":\"w002\"}");
    map.put("name", "conductor");
    map.put("version", 2);
    assertTrue(map.get("externalId") instanceof String);
    jsonUtils.expand(map);
    assertTrue(map.get("externalId") instanceof LinkedHashMap);
}