Iterable<String> list = Lists.newArrayList("cool", "pants");
    Iterator<String> iterator = list.iterator();
    assertThat(Iterators.tryFind(iterator, Predicates.alwaysFalse())).isAbsent();
    assertFalse(iterator.hasNext());
  }

  public void testTransform() {
    Iterator<String> input = asList("1", "2", "3").iterator();
    Iterator<Integer> result =
        Iterators.transform(

	sort.Slice(endpoints, func(i, j int) bool {
		iDirection, iSubset, iName, iPort := safelyParseSubsetKey(endpoints[i].ClusterName)
		jDirection, jSubset, jName, jPort := safelyParseSubsetKey(endpoints[j].ClusterName)
		if iName == jName {
			if iSubset == jSubset {
				if iPort == jPort {
					return iDirection < jDirection
				}
				return iPort < jPort
			}
			return iSubset < jSubset
		}
		return iName < jName
	})