private final Boolean _findSortAlpha(Annotated ann) {
   JsonPropertyOrder order = _findAnnotation(ann, JsonPropertyOrder.class);
   return (order == null) ? null : order.alphabetic();
 }
 @Override
 public String[] findSerializationPropertyOrder(AnnotatedClass ac) {
   JsonPropertyOrder order = _findAnnotation(ac, JsonPropertyOrder.class);
   return (order == null) ? null : order.value();
 }