Collection<List<Integer>> permutationSet =
        Collections2.permutations(Collections.<Integer>emptyList());

    assertEquals(1, permutationSet.size());
    assertTrue(permutationSet.contains(Collections.<Integer>emptyList()));

    Iterator<List<Integer>> permutations = permutationSet.iterator();
    assertNextPermutation(Collections.<Integer>emptyList(), permutations);

                  @Override
                  public Entry<String, Integer>[] createArray(int length) {
                    return (Entry<String, Integer>[]) new Entry<?, ?>[length];
                  }

                  @Override
                  public Iterable<Entry<String, Integer>> order(
                      List<Entry<String, Integer>> insertionOrder) {
                    return insertionOrder;
                  }

  private static final Integer N1 = 1;
  private static final Integer N2 = 2;
  private static final Integer N3 = 3;

  private static final String E11 = "1-1";
  private static final String E12 = "1-2";
  private static final String E12_A = "1-2a";
  private static final String E13 = "1-3";

  private final EdgeType edgeType;
  private final MutableNetwork<Integer, String> network;

  private static final Integer N1 = 1;
  private static final Integer N2 = 2;
  private static final Integer N3 = 3;

  private static final String E11 = "1-1";
  private static final String E12 = "1-2";
  private static final String E12_A = "1-2a";
  private static final String E13 = "1-3";

  private final EdgeType edgeType;
  private final MutableNetwork<Integer, String> network;

@NullUnmarked
public final class SetsFilterHashSetTest extends AbstractFilteredSetTest<Set<Integer>> {
  @Override
  Set<Integer> createUnfiltered(Iterable<Integer> contents) {
    return newHashSet(contents);
  }

  @Override
  Set<Integer> filter(Set<Integer> elements, Predicate<? super Integer> predicate) {
    return Sets.filter(elements, predicate);
  }

  private static final Joiner J = Joiner.on("-");

  // <Integer> needed to prevent warning :(
  private static final Iterable<Integer> iterable = Arrays.<Integer>asList();
  private static final Iterable<Integer> iterable1 = Arrays.asList(1);
  private static final Iterable<Integer> iterable12 = Arrays.asList(1, 2);
  private static final Iterable<Integer> iterable123 = Arrays.asList(1, 2, 3);

     *
     * @return the list of page numbers
     */
    public List<Integer> getPageNumberList() {
        return pageNumberList;
    }

    /**
     * Sets the list of page numbers for pagination display.
     *
     * @param pageNumberList the list of page numbers
     */
    public void setPageNumberList(final List<Integer> pageNumberList) {
        this.pageNumberList = pageNumberList;
    }

     *
     * @return the list of page numbers
     */
    public List<Integer> getPageNumberList() {
        return pageNumberList;
    }

    /**
     * Sets the list of page numbers for pagination navigation.
     *
     * @param pageNumberList the list of page numbers to set
     */
    public void setPageNumberList(final List<Integer> pageNumberList) {
        this.pageNumberList = pageNumberList;
    }

  }

  @Override
  protected Map<String, Collection<Integer>> makeEmptyMap() {
    return Multimaps.transformValues(
            ArrayListMultimap.<String, Integer>create(), Functions.<Integer>identity())
        .asMap();
  }

  @Override
  protected Map<String, Collection<Integer>> makePopulatedMap() {
    ListMultimap<String, Integer> delegate = ArrayListMultimap.create();
    populate(delegate);

                    "parameters": [
                        {
                            "required": True,
                            "schema": {"title": "Item Id", "type": "integer"},
                            "name": "item_id",
                            "in": "path",
                        }
                    ],
                    "requestBody": {
                        "content": {