List<String> list = nCopies(10000, "foo");
    assertThrows(
        IllegalArgumentException.class, () -> cartesianProduct(list, list, list, list, list));
  }

  public void testTransformHashCodeRandomAccess() {
    List<String> list = transform(SOME_LIST, SOME_FUNCTION);
    assertEquals(SOME_STRING_LIST.hashCode(), list.hashCode());
  }

  public void testTransformHashCodeSequential() {