* always be represented by a pair of {@code Cut} instances.
 *
 * @author Kevin Bourrillion
 */
@SuppressWarnings("rawtypes") // https://github.com/google/guava/issues/989
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class Cut<C extends Comparable> implements Comparable<Cut<C>>, Serializable {
  final C endpoint;

  Cut(C endpoint) {
    this.endpoint = endpoint;
  }

 * always be represented by a pair of {@code Cut} instances.
 *
 * @author Kevin Bourrillion
 */
@SuppressWarnings("rawtypes") // https://github.com/google/guava/issues/989
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class Cut<C extends Comparable> implements Comparable<Cut<C>>, Serializable {
  final C endpoint;

  Cut(C endpoint) {
    this.endpoint = endpoint;
  }

      if (key instanceof Cut) {
        try {
          @SuppressWarnings("unchecked") // we catch CCE's
          Cut<C> cut = (Cut<C>) key;
          if (!lowerBoundWindow.contains(cut)
              || cut.compareTo(restriction.lowerBound) < 0
              || cut.compareTo(restriction.upperBound) >= 0) {
            return null;
          } else if (cut.equals(restriction.lowerBound)) {

  }

  private static final class RangeMapEntry<K extends Comparable, V>
      extends AbstractMapEntry<Range<K>, V> {
    private final Range<K> range;
    private final V value;

    RangeMapEntry(Cut<K> lowerBound, Cut<K> upperBound, V value) {
      this(Range.create(lowerBound, upperBound), value);
    }

    RangeMapEntry(Range<K> range, V value) {
      this.range = range;
      this.value = value;
    }

    }
  }

  public void testOrderingCuts() {
    Cut<Integer> a = Range.lessThan(0).lowerBound;
    Cut<Integer> b = Range.atLeast(0).lowerBound;
    Cut<Integer> c = Range.greaterThan(0).lowerBound;
    Cut<Integer> d = Range.atLeast(1).lowerBound;
    Cut<Integer> e = Range.greaterThan(1).lowerBound;
    Cut<Integer> f = Range.greaterThan(1).upperBound;

    }
  }

  public void testOrderingCuts() {
    Cut<Integer> a = Range.lessThan(0).lowerBound;
    Cut<Integer> b = Range.atLeast(0).lowerBound;
    Cut<Integer> c = Range.greaterThan(0).lowerBound;
    Cut<Integer> d = Range.atLeast(1).lowerBound;
    Cut<Integer> e = Range.greaterThan(1).lowerBound;
    Cut<Integer> f = Range.greaterThan(1).upperBound;

      checkElementIndex(index, size);

      Cut<C> lowerBound;
      if (positiveBoundedBelow) {
        lowerBound = (index == 0) ? Cut.<C>belowAll() : ranges.get(index - 1).upperBound;
      } else {
        lowerBound = ranges.get(index).upperBound;
      }

      Cut<C> upperBound;
      if (positiveBoundedAbove && index == size - 1) {
        upperBound = Cut.<C>aboveAll();
      } else {

      checkElementIndex(index, size);

      Cut<C> lowerBound;
      if (positiveBoundedBelow) {
        lowerBound = (index == 0) ? Cut.<C>belowAll() : ranges.get(index - 1).upperBound;
      } else {
        lowerBound = ranges.get(index).upperBound;
      }

      Cut<C> upperBound;
      if (positiveBoundedAbove && index == size - 1) {
        upperBound = Cut.<C>aboveAll();
      } else {

    this.values = values;
  }

  @Override
  @CheckForNull
  public 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
  @CheckForNull
  public 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);