}

  public void testTransposeTransposed() {
    Table<Integer, String, Character> original = HashBasedTable.create();
    assertSame(original, transpose(transpose(original)));
  }

  public void testPutOriginalModifiesTranspose() {
    Table<Integer, String, Character> original = HashBasedTable.create();
    Table<String, Integer, Character> transpose = transpose(original);
    original.put(1, "foo", 'a');