*/
  public static <R, C, V> TreeBasedTable<R, C, V> create(TreeBasedTable<R, C, ? extends V> table) {
    TreeBasedTable<R, C, V> result =
        // requireNonNull is safe, as discussed in rowComparator() below.
        new TreeBasedTable<>(
            requireNonNull(table.rowKeySet().comparator()), table.columnComparator());
    result.putAll(table);
    return result;
  }

   */
  public static <R, C, V> TreeBasedTable<R, C, V> create(TreeBasedTable<R, C, ? extends V> table) {
    TreeBasedTable<R, C, V> result =
        // requireNonNull is safe, as discussed in rowComparator() below.
        new TreeBasedTable<>(
            requireNonNull(table.rowKeySet().comparator()), table.columnComparator());
    result.putAll(table);
    return result;
  }

  protected SortedMap<String, String> makeEmptyMap() {
    TreeBasedTable<String, String, String> table = TreeBasedTable.create();
    table.put("a", "b", "c");
    table.put("c", "b", "a");
    table.put("a", "a", "d");
    return table.row("b");
  }

  @Override
  protected SortedMap<String, String> makePopulatedMap() {
    TreeBasedTable<String, String, String> table = TreeBasedTable.create();
    table.put("a", "b", "c");

    super(false, true, true, true);
  }

  @Override
  TreeBasedTable<String, Integer, Character> makeTable() {
    TreeBasedTable<String, Integer, Character> table = TreeBasedTable.create();
    table.put("a", 1, 'a');
    table.put("z", 1, 'a');
    return table;
  }

  @Override
  protected Map<String, Map<Integer, Character>> makePopulatedMap() {
    TreeBasedTable<String, Integer, Character> table = makeTable();

  protected SortedMap<String, String> makeEmptyMap() {
    TreeBasedTable<String, String, String> table = TreeBasedTable.create();
    table.put("a", "b", "c");
    table.put("c", "b", "a");
    table.put("a", "a", "d");
    return table.row("b");
  }

  @Override
  protected SortedMap<String, String> makePopulatedMap() {
    TreeBasedTable<String, String, String> table = TreeBasedTable.create();
    table.put("a", "b", "c");

    super(false, true, true, true);
  }

  @Override
  TreeBasedTable<String, Integer, Character> makeTable() {
    TreeBasedTable<String, Integer, Character> table = TreeBasedTable.create();
    table.put("a", 1, 'a');
    table.put("z", 1, 'a');
    return table;
  }

  @Override
  protected Map<String, Map<Integer, Character>> makePopulatedMap() {
    TreeBasedTable<String, Integer, Character> table = makeTable();

    return suite;
  }

  private TreeBasedTable<String, Integer, Character> sortedTable;

  protected TreeBasedTable<String, Integer, Character> create(
      Comparator<? super String> rowComparator,
      Comparator<? super Integer> columnComparator,
      Object... data) {
    TreeBasedTable<String, Integer, Character> table =
        TreeBasedTable.create(rowComparator, columnComparator);
    table.put("foo", 4, 'a');

                new TestStringSortedSetGenerator() {
                  @Override
                  protected SortedSet<String> create(String[] elements) {
                    TreeBasedTable<String, Integer, Character> table = TreeBasedTable.create();
                    populateForRowKeySet(table, elements);
                    return table.rowKeySet();
                  }

                  @Override

                new TestStringSortedSetGenerator() {
                  @Override
                  protected SortedSet<String> create(String[] elements) {
                    TreeBasedTable<String, Integer, Character> table = TreeBasedTable.create();
                    populateForRowKeySet(table, elements);
                    return table.rowKeySet();
                  }

                  @Override

 * single row key may or may not be ordered, depending on the implementation. When rows and columns
 * are both sorted, it's easier to use the {@link TreeBasedTable} subclass.
 *
 * <p>The {@link #rowKeySet} method returns a {@link SortedSet} and the {@link #rowMap} method
 * returns a {@link SortedMap}, instead of the {@link Set} and {@link Map} specified by the {@link