}

    @Override
    public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate().tailMap(fromKey, inclusive);
    }

    @Override
    public SortedMap<K, V> tailMap(K fromKey) {
      return tailMap(fromKey, true);
    }

    @Override
    public Comparator<? super K> comparator() {

    checkNotNull(toKey);
    checkArgument(comparator.compare(fromKey, toKey) <= 0);
    return tailMap(fromKey, fromInclusive).headMap(toKey, toInclusive);
  }

  public ImmutableSortedMap<K, V> tailMap(K fromKey) {
    checkNotNull(fromKey);
    return newView(sortedDelegate.tailMap(fromKey));
  }

  public ImmutableSortedMap<K, V> tailMap(K fromKeyParam, boolean inclusive) {

    assertEquals(2, row.size());
    assertEquals(1, row.tailMap(15).size());
  }

  public void testSubRowClearAndPut() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    SortedMap<Integer, Character> row = (SortedMap<Integer, Character>) table.row("foo");
    SortedMap<Integer, Character> subRow = row.tailMap(2);
    assertEquals(ImmutableMap.of(1, 'a', 3, 'c'), row);

            .containsExactlyElementsIn(expected.headMap(key, inclusive).entrySet())
            .inOrder();
        assertThat(navigableMap.tailMap(key, inclusive).entrySet())
            .containsExactlyElementsIn(expected.tailMap(key, inclusive).entrySet())
            .inOrder();
        assertThat(navigableMap.headMap(key, inclusive).descendingMap().entrySet())

    public SortedMap<C, V> headMap(C toKey) {
      checkArgument(rangeContains(checkNotNull(toKey)));
      return new TreeRow(rowKey, lowerBound, toKey);
    }

    @Override
    public SortedMap<C, V> tailMap(C fromKey) {
      checkArgument(rangeContains(checkNotNull(fromKey)));
      return new TreeRow(rowKey, fromKey, upperBound);
    }

    @Override
    public C firstKey() {
      updateBackingRowMapField();

    Set<Integer> googleValues = ImmutableSet.of(2, 6);
    Set<Integer> treeValues = ImmutableSet.of(4, 0);
    assertEquals(ImmutableMap.of("google", googleValues, "tree", treeValues), asMap.tailMap("g"));
    assertEquals(ImmutableMap.of("google", googleValues, "foo", fooValues), asMap.headMap("h"));
    assertEquals(ImmutableMap.of("google", googleValues), asMap.subMap("g", "h"));
  }

      if (from == Bound.NO_BOUND && to == Bound.EXCLUSIVE) {
        return map.headMap(lastExclusive);
      } else if (from == Bound.INCLUSIVE && to == Bound.NO_BOUND) {
        return map.tailMap(firstInclusive);
      } else if (from == Bound.INCLUSIVE && to == Bound.EXCLUSIVE) {
        return map.subMap(firstInclusive, lastExclusive);
      } else {
        throw new IllegalArgumentException();
      }

            MoreObjects.firstNonNull(
                entriesByLowerBound.floorKey(subRange.lowerBound), subRange.lowerBound);
        final Iterator<RangeMapEntry<K, V>> backingItr =
            entriesByLowerBound.tailMap(cutToStart, true).values().iterator();
        return new AbstractIterator<Entry<Range<K>, V>>() {

          @Override
          @CheckForNull
          protected Entry<Range<K>, V> computeNext() {

            MoreObjects.firstNonNull(
                entriesByLowerBound.floorKey(subRange.lowerBound), subRange.lowerBound);
        final Iterator<RangeMapEntry<K, V>> backingItr =
            entriesByLowerBound.tailMap(cutToStart, true).values().iterator();
        return new AbstractIterator<Entry<Range<K>, V>>() {

          @Override
          @CheckForNull
          protected Entry<Range<K>, V> computeNext() {