assertEquals(range, range.intersection(range));

    assertEquals(range, range.intersection(Range.atMost(4)));
    assertEquals(range, range.intersection(Range.atMost(3)));
    assertEquals(range, range.intersection(Range.atLeast(3)));
    assertEquals(range, range.intersection(Range.atLeast(2)));

    assertEquals(Range.closedOpen(3, 3), range.intersection(Range.lessThan(3)));

    assertEquals(range, range.intersection(range));

    assertEquals(range, range.intersection(Range.atMost(4)));
    assertEquals(range, range.intersection(Range.atMost(3)));
    assertEquals(range, range.intersection(Range.atLeast(3)));
    assertEquals(range, range.intersection(Range.atLeast(2)));

    assertEquals(Range.closedOpen(3, 3), range.intersection(Range.lessThan(3)));

    Set<String> enemies = Sets.newHashSet("Dick", "Harry", "Tom");

    Set<String> frenemies = Sets.intersection(friends, enemies);
    assertEquals(1, frenemies.size());

    ImmutableSet<String> immut = Sets.intersection(friends, enemies).immutableCopy();
    HashSet<String> mut = Sets.intersection(friends, enemies).copyInto(new HashSet<String>());

    enemies.add("Joe");
    assertEquals(2, frenemies.size());

    Set<String> enemies = Sets.newHashSet("Dick", "Harry", "Tom");

    Set<String> frenemies = Sets.intersection(friends, enemies);
    assertEquals(1, frenemies.size());

    ImmutableSet<String> immut = Sets.intersection(friends, enemies).immutableCopy();
    HashSet<String> mut = Sets.intersection(friends, enemies).copyInto(new HashSet<String>());

    enemies.add("Joe");
    assertEquals(2, frenemies.size());

   *
   * <p>For example, the intersection of {@code [1..5]} and {@code (3..7)} is {@code (3..5]}. The
   * resulting range may be empty; for example, {@code [1..5)} intersected with {@code [5..7)}
   * yields the empty range {@code [5..5)}.
   *
   * <p>The intersection exists if and only if the two ranges are {@linkplain #isConnected
   * connected}.
   *

            for (Entry<Range<Integer>, Integer> entry : rangeMap.asMapOfRanges().entrySet()) {
              if (entry.getKey().isConnected(subRange)
                  && !entry.getKey().intersection(subRange).isEmpty()) {
                expectedBuilder.put(entry.getKey().intersection(subRange), entry.getValue());
              }
            }

            ImmutableRangeMap<Integer, Integer> expected = expectedBuilder.build();

	}

	nonInterIPV4s := mustGetLocalIP4().Intersection(hostIPs)
	if nonInterIPV4s.IsEmpty() {
		hostIPs = hostIPs.ApplyFunc(func(ip string) string {
			if net.ParseIP(ip).IsLoopback() {
				// Any loopback IP which is not 127.0.0.1
				// convert it to check for intersections.
				return "127.0.0.1"
			}
			return ip
		})
		nonInterIPV4s = mustGetLocalIP4().Intersection(hostIPs)
	}

    ContiguousSet<Integer> emptySet = ContiguousSet.closedOpen(2, 2);
    assertEquals(ImmutableSet.of(), set.intersection(emptySet));
    assertEquals(ImmutableSet.of(), emptySet.intersection(set));
    assertEquals(
        ImmutableSet.of(),
        ContiguousSet.create(Range.closed(-5, -1), integers())
            .intersection(ContiguousSet.create(Range.open(3, 64), integers())));
  }

  public void testIntersection() {

    ContiguousSet<Integer> emptySet = ContiguousSet.closedOpen(2, 2);
    assertEquals(ImmutableSet.of(), set.intersection(emptySet));
    assertEquals(ImmutableSet.of(), emptySet.intersection(set));
    assertEquals(
        ImmutableSet.of(),
        ContiguousSet.create(Range.closed(-5, -1), integers())
            .intersection(ContiguousSet.create(Range.open(3, 64), integers())));
  }

  public void testIntersection() {

        && ceilingEntry.getValue().isConnected(range)
        && !ceilingEntry.getValue().intersection(range).isEmpty()) {
      return true;
    }
    Entry<Cut<C>, Range<C>> priorEntry = rangesByLowerBound.lowerEntry(range.lowerBound);
    return priorEntry != null
        && priorEntry.getValue().isConnected(range)
        && !priorEntry.getValue().intersection(range).isEmpty();
  }

  @Override