### Question:
UUIDUtils { public static String toOID(UUID uuid) { return toOID(uuid, OID_ROOT); }  static boolean isUUID(String uuidstr); static String toOID(UUID uuid); static String toOID(UUID uuid, String prefix); static String toOIDFromUUIDString(String uuidstr); static String toOIDFromUUIDString(String uuidstr, String prefix); static final String OID_ROOT; }### Answer:
@Test public void toOIDTest() throws Exception { UUID uuid = UUID.fromString("f81d4fae-7dec-11d0-a765-00a0c91e6bf6"); assertEquals("2.25.329800735698586629295641978511506172918", UUIDUtils.toOID(uuid)); }