@Test
public void testJsonJaxbAwareAbstract() throws Exception {

    LOG.info("testJsonJaxbAware");
    final SomeConcrete x = new SomeConcrete(1, "x");
    final String s = Json.toJson(x);
    LOG.info("x.toJson = {}", s);
    Assert.assertEquals(
            "{\"CONCRETE\":{\"value\":1,\"name\":\"x\"}}",
            s);
}