public void testStreamToArrayUnknownOrder() {
    Helpers.assertEqualIgnoringOrder(getSampleElements(), asList(collection.stream().toArray()));
  }

  @CollectionFeature.Require(KNOWN_ORDER)
  public void testStreamToArrayKnownOrder() {
    assertEquals(getOrderedElements(), asList(collection.stream().toArray()));
  }

  public void testStreamCount() {
    assertEquals(getNumElements(), collection.stream().count());
  }

                if (fessConfig.isValidSearchLogPermissions(roles.toArray(new String[roles.size()]))) {
                    suggester.indexer()
                            .indexFromSearchWord(sb.toString(), fields.toArray(new String[fields.size()]),
                                    tags.toArray(new String[tags.size()]), roles.toArray(new String[roles.size()]), 1, langs);

     */
    Interface a = new Impl();
    Interface b = new Impl();
    ImmutableSortedSet<Interface> set = ImmutableSortedSet.of(a, b);
    Object[] unused1 = set.toArray();
    Object[] unused2 = set.toArray(new Object[2]);
  }

  interface Interface extends Comparable<Interface> {}

  static class Impl implements Interface {
    static int nextId;
    Integer id = nextId++;

        try (final ResponseData responseData = s3Client.doGet("s3://fess/")) {
            fail();
        } catch (ChildUrlsException e) {
            String[] values = e.getChildUrlList().stream().map(d -> d.getUrl()).sorted().toArray(n -> new String[n]);
            assertEquals(3, values.length);
            assertEquals("s3://fess/dir1/", values[0]);
            assertEquals("s3://fess/dir3/", values[1]);

     */
    Interface a = new Impl();
    Interface b = new Impl();
    ImmutableSortedSet<Interface> set = ImmutableSortedSet.of(a, b);
    Object[] unused1 = set.toArray();
    Object[] unused2 = set.toArray(new Object[2]);
  }

  interface Interface extends Comparable<Interface> {}

  static class Impl implements Interface {
    static int nextId;
    Integer id = nextId++;

      int i = 0;
      for (Entry<K, V> entry : originalEntries) {
        entries.add(mapEntry(keysArray[i++], entry.getValue()));
      }

      return mapGenerator.create(entries.toArray()).keySet();
    }

    @Override
    public K[] createArray(int length) {
      // TODO: with appropriate refactoring of OneSizeGenerator, we can perhaps
      // tidy this up and get rid of the casts here and in

        try (final ResponseData responseData = gcsClient.doGet("gcs://fess/")) {
            fail();
        } catch (ChildUrlsException e) {
            String[] values = e.getChildUrlList().stream().map(d -> d.getUrl()).sorted().toArray(n -> new String[n]);
            assertEquals(3, values.length);
            assertEquals("gcs://fess/dir1/", values[0]);
            assertEquals("gcs://fess/dir3/", values[1]);

            final String key = "frontmatter." + entry.getKey();
            final List<String> values = entry.getValue();
            if (values != null && !values.isEmpty()) {
                extractData.putValues(key, values.toArray(new String[0]));
            }
        }
    }

    /**
     * Extracts heading text from the document.
     *
     * @param document the parsed Markdown document

    @Override
    public boolean retainAll(Collection<?> collection) {
      return standardRetainAll(collection);
    }

    @Override
    public Object[] toArray() {
      return standardToArray();
    }

    @Override
    public <T> T[] toArray(T[] array) {
      return standardToArray(array);
    }

    @Override
    public String toString() {
      return standardToString();
    }
  }

    @Override
    public boolean retainAll(Collection<?> collection) {
      return standardRetainAll(collection);
    }

    @Override
    public Object[] toArray() {
      return standardToArray();
    }

    @Override
    public <T> T[] toArray(T[] array) {
      return standardToArray(array);
    }

    @Override
    public String toString() {
      return standardToString();
    }