ChannelGroupUID extends UID { ChannelGroupUID() { super(); } ChannelGroupUID();  ChannelGroupUID(String channelGroupUid);  ChannelGroupUID(ThingUID thingUID, String id); String getId(); ThingUID getThingUID();  }
@Test public void testChannelGroupUID() { ChannelGroupUID channelGroupUID = new ChannelGroupUID(THING_UID, GROUP_ID); assertEquals("binding:thing-type:thing:group", channelGroupUID.toString()); assertEquals(GROUP_ID, channelGroupUID.getId()); assertEquals(THING_UID, channelGroupUID.getThingUID()); }