return emptySet();
    } else {
      return emptyList();
    }
  }

  @Override
  public void clear() {
    keySet().clear();
  }

  @Override
  Set<K> createKeySet() {
    return Sets.filter(unfiltered.keySet(), keyPredicate);
  }

  @Override
  public Collection<V> get(@ParametricNullness K key) {
    if (keyPredicate.apply(key)) {
      return unfiltered.get(key);

     * @param filter additional resource name filter to apply
     * @param searchAttributes the file attributes to search for
     * @throws CIFSException if an error occurs during initialization
     */
    public DirFileEntryEnumIteratorBase(final SmbTreeHandleImpl th, final SmbResource parent, final String wildcard,
            final ResourceNameFilter filter, final int searchAttributes) throws CIFSException {

                final List<String> urlList = split(startUrls.toString(), "\n")
                        .get(stream -> stream.map(String::trim).filter(StringUtil::isNotBlank).collect(Collectors.toList()));

                final String webUrls = urlList.stream()
                        .filter(s -> Arrays.stream(webProtocols).anyMatch(p -> s.startsWith(p)))
                        .collect(Collectors.joining("\n"));

   * <p><b>{@code Stream} equivalent:</b> {@link Stream#filter}.
   */
  public static <T extends @Nullable Object> Iterable<T> filter(
      Iterable<T> unfiltered, Predicate<? super T> retainIfTrue) {
    checkNotNull(unfiltered);
    checkNotNull(retainIfTrue);
    return new FluentIterable<T>() {
      @Override
      public Iterator<T> iterator() {
        return Iterators.filter(unfiltered.iterator(), retainIfTrue);
      }

            }

        functionalTests = topLevelFunctionalTests + functionalTestsPass
        crossVersionTests =
            topLevelFunctionalTests.filter { it.testCoverage.isCrossVersionTest } +
            functionalTestsPass.filter { it.testCoverage.isCrossVersionTest }
        if (stage.stageName !in listOf(StageName.QUICK_FEEDBACK_LINUX_ONLY, StageName.QUICK_FEEDBACK)) {

    }

    /**
     * Displays a paginated list of related query items.
     *
     * @param pageNumber the page number to display (optional)
     * @param form the search form containing filter criteria
     * @return HTML response with the related query list
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse list(final OptionalThing<Integer> pageNumber, final SearchForm form) {

     */
    CloseableIterator<SmbResource> children(ResourceNameFilter filter) throws CIFSException;

    /**
     * Fetch children matching the given filter.
     *
     * @param filter
     *            filter acting on SmbResource instances
     * @return an iterator over the child resources

# General - How To - Recipes { #general-how-to-recipes }

Here are several pointers to other places in the docs, for general or frequent questions.

## Filter Data - Security { #filter-data-security }

To ensure that you don't return more data than you should, read the docs for [Tutorial - Response Model - Return Type](../tutorial/response-model.md){.internal-link target=_blank}.

## Documentation Tags - OpenAPI { #documentation-tags-openapi }

    checkNotNull(annotationType);
    return FluentIterable.from(annotations).filter(annotationType).first().orNull();
  }

  /**
   * @since 18.0
   */
  @Override
  public <A extends Annotation> A[] getDeclaredAnnotationsByType(Class<A> annotationType) {
    @Nullable A[] result =
        FluentIterable.from(annotations).filter(annotationType).toArray(annotationType);

   * <p><b>{@code Stream} equivalent:</b> {@link Stream#filter} (same).
   */
  public final FluentIterable<E> filter(Predicate<? super E> predicate) {
    return from(Iterables.filter(getDelegate(), predicate));
  }

  /**
   * Returns the elements from this fluent iterable that are instances of class {@code type}.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.filter(type::isInstance).map(type::cast)}.