*     a provided list is null
   * @since 19.0
   */
  public static <B> List<List<B>> cartesianProduct(List<? extends List<? extends B>> lists) {
    return CartesianList.create(lists);
  }

  /**
   * Returns every possible list that can be formed by choosing one element from each of the given

    List<@Nullable Integer> list1 = Lists.newArrayList();
    List<@Nullable Integer> list2 = Lists.newArrayList(1);
    List<@Nullable Integer> list3 = Lists.newArrayList(1, 1);
    List<@Nullable Integer> list4 = Lists.newArrayList(1, 2);
    List<@Nullable Integer> list5 = Lists.newArrayList(1, null, 2);
    List<@Nullable Integer> list6 = Lists.newArrayList(2);

    List<@Nullable Integer> list1 = Lists.newArrayList();
    List<@Nullable Integer> list2 = Lists.newArrayList(1);
    List<@Nullable Integer> list3 = Lists.newArrayList(1, 1);
    List<@Nullable Integer> list4 = Lists.newArrayList(1, 2);
    List<@Nullable Integer> list5 = Lists.newArrayList(1, null, 2);
    List<@Nullable Integer> list6 = Lists.newArrayList(2);

    assertEquals(asList(1, 4, 7, 8, 9, 10), newArrayList(result));
    assertEquals("[1, 4, 7, 8, 9, 10]", result.toString());
  }

  public void testConcatNullPointerException() {
    List<Integer> list1 = newArrayList(1);
    List<Integer> list2 = newArrayList(4);

    try {
      FluentIterable.concat(list1, null, list2);
      fail();

    assertEquals(asList(1, 4, 7, 8, 9, 10), newArrayList(result));
    assertEquals("[1, 4, 7, 8, 9, 10]", result.toString());
  }

  public void testConcatNullPointerException() {
    List<Integer> list1 = newArrayList(1);
    List<Integer> list2 = newArrayList(4);

    try {
      Iterables.concat(list1, null, list2);
      fail();
    } catch (NullPointerException expected) {

    assertEquals(asList(1, 4, 7, 8, 9, 10), newArrayList(result));
    assertEquals("[1, 4, 7, 8, 9, 10]", result.toString());
  }

  public void testConcatNullPointerException() {
    List<Integer> list1 = newArrayList(1);
    List<Integer> list2 = newArrayList(4);

    try {
      Iterables.concat(list1, null, list2);
      fail();
    } catch (NullPointerException expected) {

    assertThat(Lists.cartesianProduct(list(1, 2), list(3, 4)))
        .containsExactly(list(1, 3), list(1, 4), list(2, 3), list(2, 4))
        .inOrder();
  }

  public void testCartesianProduct_2x2x2() {
    assertThat(Lists.cartesianProduct(list(0, 1), list(0, 1), list(0, 1)))
        .containsExactly(
            list(0, 0, 0),
            list(0, 0, 1),
            list(0, 1, 0),
            list(0, 1, 1),

    assertThat(Lists.cartesianProduct(list(1, 2), list(3, 4)))
        .containsExactly(list(1, 3), list(1, 4), list(2, 3), list(2, 4))
        .inOrder();
  }

  public void testCartesianProduct_2x2x2() {
    assertThat(Lists.cartesianProduct(list(0, 1), list(0, 1), list(0, 1)))
        .containsExactly(
            list(0, 0, 0),
            list(0, 0, 1),
            list(0, 1, 0),
            list(0, 1, 1),

	return &cobra.Command{
		Use:   "list",
		Short: "Lists available Istio configuration profiles",
		Long:  "The list subcommand lists the available Istio configuration profiles.",
		Args:  cobra.ExactArgs(0),
		RunE: func(cmd *cobra.Command, args []string) error {
			return profileList(cmd, plArgs)
		},
	}
}

// profileList list all the builtin profiles.

  }

  public void testToArrayImpl1() {
    doTestToArrayImpl1(Lists.<Integer>newArrayList());
    doTestToArrayImpl1(Lists.newArrayList(1));
    doTestToArrayImpl1(Lists.<@Nullable Integer>newArrayList(1, null, 3));
  }

  private void doTestToArrayImpl1(List<Integer> list) {
    Object[] reference = list.toArray();
    Object[] target = ObjectArrays.toArrayImpl(list);
    assertEquals(reference.getClass(), target.getClass());