@GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  static <C extends Comparable> Cut<C> belowValue(C endpoint) {
    return new BelowValue<>(endpoint);
  }

  private static final class BelowValue<C extends Comparable> extends Cut<C> {
    BelowValue(C endpoint) {
      super(checkNotNull(endpoint));
    }

    @Override
    boolean isLessThan(C value) {

    }
  }

  @Override
  public @Nullable Range<C> rangeContaining(C value) {
    checkNotNull(value);
    Entry<Cut<C>, Range<C>> floorEntry = rangesByLowerBound.floorEntry(Cut.belowValue(value));
    if (floorEntry != null && floorEntry.getValue().contains(value)) {
      return floorEntry.getValue();
    } else {
      // TODO(kevinb): revisit this design choice
      return null;
    }
  }

    this.values = values;
  }

  @Override
  public @Nullable V get(K key) {
    int index =
        SortedLists.binarySearch(
            ranges,
            Range::lowerBound,
            Cut.belowValue(key),
            KeyPresentBehavior.ANY_PRESENT,
            KeyAbsentBehavior.NEXT_LOWER);
    if (index == -1) {
      return null;
    } else {
      Range<K> range = ranges.get(index);

    this.values = values;
  }

  @Override
  public @Nullable V get(K key) {
    int index =
        SortedLists.binarySearch(
            ranges,
            Range::lowerBound,
            Cut.belowValue(key),
            KeyPresentBehavior.ANY_PRESENT,
            KeyAbsentBehavior.NEXT_LOWER);
    if (index == -1) {
      return null;
    } else {
      Range<K> range = ranges.get(index);

  }

  @Override
  public @Nullable Entry<Range<K>, V> getEntry(K key) {
    Entry<Cut<K>, RangeMapEntry<K, V>> mapEntry =
        entriesByLowerBound.floorEntry(Cut.belowValue(key));
    if (mapEntry != null && mapEntry.getValue().contains(key)) {
      return mapEntry.getValue();
    } else {
      return null;
    }
  }

  @Override

  }

  @Override
  public @Nullable Range<C> rangeContaining(C value) {
    int index =
        SortedLists.binarySearch(
            ranges,
            Range::lowerBound,
            Cut.belowValue(value),
            Ordering.natural(),
            ANY_PRESENT,
            NEXT_LOWER);
    if (index != -1) {
      Range<C> range = ranges.get(index);
      return range.contains(value) ? range : null;