}

  public void testPutCoalescingSubmapEmpty() {
    RangeMap<Integer, Integer> rangeMap = TreeRangeMap.create();
    rangeMap.put(Range.closedOpen(0, 1), 1);
    rangeMap.put(Range.closedOpen(1, 2), 1);
    assertEquals(
        ImmutableMap.of(Range.closedOpen(0, 1), 1, Range.closedOpen(1, 2), 1),
        rangeMap.asMapOfRanges());

  }

  @SuppressWarnings("unchecked")
  public static <K extends Comparable<?>, V> ImmutableRangeMap<K, V> copyOf(
      RangeMap<K, ? extends V> rangeMap) {
    if (rangeMap instanceof ImmutableRangeMap) {
      return (ImmutableRangeMap<K, V>) rangeMap;
    }
    Map<Range<K>, ? extends V> map = rangeMap.asMapOfRanges();
    ImmutableList.Builder<Range<K>> rangesBuilder = new ImmutableList.Builder<>(map.size());

  }

  @SuppressWarnings("unchecked")
  public static <K extends Comparable<?>, V> ImmutableRangeMap<K, V> copyOf(
      RangeMap<K, ? extends V> rangeMap) {
    if (rangeMap instanceof ImmutableRangeMap) {
      return (ImmutableRangeMap<K, V>) rangeMap;
    }
    Map<Range<K>, ? extends V> map = rangeMap.asMapOfRanges();
    ImmutableList.Builder<Range<K>> rangesBuilder = new ImmutableList.Builder<>(map.size());

    }

    @Override
    public void putAll(RangeMap<K, ? extends V> rangeMap) {
      if (rangeMap.asMapOfRanges().isEmpty()) {
        return;
      }
      Range<K> span = rangeMap.span();
      checkArgument(
          subRange.encloses(span),
          "Cannot putAll rangeMap with span %s into a subRangeMap(%s)",
          span,
          subRange);

  }

  public void testPutCoalescingSubmapEmpty() {
    RangeMap<Integer, Integer> rangeMap = TreeRangeMap.create();
    rangeMap.put(Range.closedOpen(0, 1), 1);
    rangeMap.put(Range.closedOpen(1, 2), 1);
    assertEquals(
        ImmutableMap.of(Range.closedOpen(0, 1), 1, Range.closedOpen(1, 2), 1),
        rangeMap.asMapOfRanges());