@Override
    public String toString() {
        return new StringJoiner(", ", DownloadBean.class.getSimpleName() + "[", "]")
            .add("id='" + id + "'")
            .add("type=" + type)
            .add("path='" + path + "'")
            .add("expires=" + expires)
            .toString();
    }
@param expires the expires to set
manager/api/beans/src/main/java/io/apiman/manager/api/beans/download/DownloadBean.java