@Override
    public int hashCode() {
        int result = id != null ? id.hashCode() : 0;
        result = 31 * result + (category != null ? category.hashCode() : 0);
        result = 31 * result + (key != null ? key.hashCode() : 0);
        result = 31 * result + (value != null ? value.hashCode() : 0);
        result = 31 * result + (updateDateTime != null ? updateDateTime.hashCode() : 0);
        return result;
    }