### Question:
HubID { public static String fromMac(String mac) { return fromMac(MACAddress.macToLong(mac)); }  static String fromMac(String mac); static String fromMac(long mac);  }### Answer:
@Test public void testHubFromMac() { assertEquals("LWW-1107", HubID.fromMac("00:16:A2:05:FE:06")); assertEquals("HFH-2672", HubID.fromMac("A0:19:B2:B0:00:00")); }