*
   * @param rowComparator the comparator that orders the row keys
   * @param columnComparator the comparator that orders the column keys
   */
  public static <R, C, V> TreeBasedTable<R, C, V> create(
      Comparator<? super R> rowComparator, Comparator<? super C> columnComparator) {
    checkNotNull(rowComparator);
    checkNotNull(columnComparator);

   *
   * @param rowComparator the comparator that orders the row keys
   * @param columnComparator the comparator that orders the column keys
   */
  public static <R, C, V> TreeBasedTable<R, C, V> create(
      Comparator<? super R> rowComparator, Comparator<? super C> columnComparator) {
    checkNotNull(rowComparator);
    checkNotNull(columnComparator);

  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');
    table.put("cat", 1, 'b');
    table.clear();
    populate(table, data);