assertThat(table.column(1).keySet()).containsExactly('a', 'b', 'c').inOrder();
  }

  public void testBuilder_orderRowsBy_sparse() {
    ImmutableTable.Builder<Character, Integer, String> builder = ImmutableTable.builder();
    builder.orderRowsBy(Ordering.natural());
    builder.put('x', 2, "foo");
    builder.put('r', 1, "bar");
    builder.put('c', 3, "baz");
    builder.put('b', 7, "cat");

    assertThat(table.column(1).keySet()).containsExactly('a', 'b', 'c').inOrder();
  }

  public void testBuilder_orderRowsBy_sparse() {
    ImmutableTable.Builder<Character, Integer, String> builder = ImmutableTable.builder();
    builder.orderRowsBy(Ordering.natural());
    builder.put('x', 2, "foo");
    builder.put('r', 1, "bar");
    builder.put('c', 3, "baz");
    builder.put('b', 7, "cat");

   * copied table may have different iteration orders. For more control over the ordering, create a
   * {@link Builder} and call {@link Builder#orderRowsBy}, {@link Builder#orderColumnsBy}, and
   * {@link Builder#putAll}
   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is

   * copied table may have different iteration orders. For more control over the ordering, create a
   * {@link Builder} and call {@link Builder#orderRowsBy}, {@link Builder#orderColumnsBy}, and
   * {@link Builder#putAll}
   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is