private static void convertHints(@NotNull JsonWriter writer, @NotNull Element hints) throws IOException {
    writer.name(HINTS);
    writer.beginArray();
    for (Element hint : hints.getChildren(HINT)) {
      writer.value(hint.getAttributeValue(VALUE));
    }
    writer.endArray();
  }
private static void convertHints(@NotNull JsonWriter writer, @NotNull Element hints)