sub.clear();
    assertEquals(
        ImmutableMap.of(Range.open(3, 5), 1, Range.closed(12, 16), 3), rangeMap.asMapOfRanges());
  }

  public void testCopyOfTreeRangeMap() {
    RangeMap<Integer, Integer> rangeMap = TreeRangeMap.create();
    rangeMap.put(Range.open(3, 7), 1);
    rangeMap.put(Range.closed(9, 10), 2);
    rangeMap.put(Range.closed(12, 16), 3);