private static @NotNull String parseCurrency(@NotNull Map<String, Object> jsonObject) {
    Object iso = jsonObject.get("iso");
    if (iso instanceof String) {
      Currency currency = Currency.getInstance((String)iso);
      if (currency != null) {
        return currency.getSymbol(Locale.ENGLISH);
      }
    }
    return "";
  }
private static @NotNull String parseCurrency(@NotNull Map<String, Object> jsonObject)