DomHelper { static String base64RandomUuid () { return Helpers.base64FromUuid(UUID.randomUUID()); }    }
@Test public void testBase64RandomUuid() throws Exception { String uuid1 = DomHelper.base64RandomUuid(); System.out.println(Helpers.uuidFromBase64(uuid1)); String uuid2 = DomHelper.base64RandomUuid(); System.out.println(Helpers.uuidFromBase64(uuid2)); }