*/
    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

      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);

	t.Once.Do(func() {
		t.ttl = ttl
		t.updateFn = update
		t.opts = opts
	})
}

// GetWithCtx will return a cached value or fetch a new one.
// passes a caller context, if caller context cancels nothing
// is cached.
// If the Update function returns an error the value is forwarded as is and not cached.
func (t *Cache[T]) GetWithCtx(ctx context.Context) (T, error) {
	v := t.val.Load()

                        .filter(container -> container.element != null),
                // Profile builds
                root.child(PROFILES).stream()
                        .flatMap(profiles -> profiles.children(PROFILE))
                        .map(profile -> new BuildContainer(profile.child(BUILD).orElse(null), "profile build"))
                        .filter(container -> container.element != null));

 *
 * <p>{@code CharSink} provides two kinds of methods:
 *
 * <ul>
 *   <li><b>Methods that return a writer:</b> These methods should return a <i>new</i>, independent
 *       instance each time they are called. The caller is responsible for ensuring that the
 *       returned writer is closed.
 *   <li><b>Convenience methods:</b> These are implementations of common operations that are

    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);

      "number_of_replicas": 0,
      "auto_expand_replicas": "0-1"
    },
    "analysis": {
      "analyzer": {
        "standard_analyzer": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "cjk_width",
            "asciifolding",
            "lowercase",
            "stop",
            "stemmer"
          ]
        }
      }
    }
  }

    @Override
    public boolean include(Artifact artifact) {
        boolean include = true;
        for (Iterator<ArtifactFilter> i = filters.iterator(); i.hasNext() && include; ) {
            ArtifactFilter filter = i.next();
            if (!filter.include(artifact)) {
                include = false;
            }
        }
        return include;
    }

    public void add(ArtifactFilter artifactFilter) {

        bool((must, should, mustNot, filter) -> {
            filteredLambda.callback(must, filter);
        }, opLambda);
    }

    public void not(OperatorCall<RoleCQ> notLambda) {
        not(notLambda, null);
    }

    public void not(final OperatorCall<RoleCQ> notLambda, final ConditionOptionCall<BoolQueryBuilder> opLambda) {
        bool((must, should, mustNot, filter) -> notLambda.callback(mustNot), opLambda);
    }

        assertFalse(iterator.hasNext(), "Should not have more elements");

        // Verify filter was called for each element
        verify(mockFilter, times(2)).accept(any(SmbResource.class));
    }

    /**
     * Test iterator with filter that rejects all elements.
     */
    @Test
    void testIteratorWithFilterRejectingAll() throws CIFSException {
        // Given