// Test to ensure that we can check property ordering defaults...
  public void testConfigForPropertySorting() throws Exception {
    ObjectMapper m = new ObjectMapper();

    // sort-alphabetically is disabled by default:
    assertFalse(m.isEnabled(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY));
    SerializationConfig sc = m.getSerializationConfig();
    assertFalse(sc.isEnabled(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY));
    assertFalse(sc.shouldSortPropertiesAlphabetically());
    DeserializationConfig dc = m.getDeserializationConfig();
    assertFalse(dc.shouldSortPropertiesAlphabetically());

    // but when enabled, should be visible:
    m.enable(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY);
    sc = m.getSerializationConfig();
    assertTrue(sc.isEnabled(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY));
    assertTrue(sc.shouldSortPropertiesAlphabetically());
    dc = m.getDeserializationConfig();
    // and not just via SerializationConfig, but also via DeserializationConfig
    assertTrue(dc.isEnabled(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY));
    assertTrue(dc.shouldSortPropertiesAlphabetically());
  }
 public final boolean isEnabled(MapperFeature feat) {
   return _config.isEnabled(feat);
 }