*
 * <p>If you have your own graph implementation based around a custom node type {@code MyNode},
 * which has a method {@code getChildren()} that retrieves its successors in a graph:
 *
 * {@snippet :
 * someGraphAlgorithm(startNode, MyNode::getChildren);
 * }
 *
 * <p>If you have some other mechanism for returning the successors of a node, or one that doesn't

        Set<Artifact> artifacts = new LinkedHashSet<>();
        if (result.getDependencyGraph() != null
                && !result.getDependencyGraph().getChildren().isEmpty()) {
            RepositoryUtils.toArtifacts(
                    artifacts,
                    result.getDependencyGraph().getChildren(),
                    Collections.singletonList(project.getArtifact().getId()),
                    collectionFilter);
        }

        collectRequest.addRepository(newTestRepository());

        CollectResult collectResult = system.collectDependencies(session, collectRequest);

        List<DependencyNode> nodes = collectResult.getRoot().getChildren();
        assertEquals(2, nodes.size());
        checkUtSimpleArtifactDependencies(
                nodes.get(0).getDependency(), nodes.get(1).getDependency());
    }

    @Test

    /**
     * Gets the children of this result.
     *
     * @return the children of this result, can be empty but never {@code null}
     */
    @Nonnull
    List<? extends ModelBuilderResult> getChildren();

    /**
     * Creates a human-readable representation of these errors.
     */
    @Override
    String toString();

        } finally {
            lock.writeLock().unlock();
        }
    }

    /**
     * Get all children
     *
     * @return list of child file info
     */
    public List<FileInfo> getChildren() {
        lock.readLock().lock();
        try {
            lastAccessTime = System.currentTimeMillis();
            return new ArrayList<>(children.values());
        } finally {

    entry.updateChild("file1.txt", attrs);
    
    assertTrue(entry.hasChild("file1.txt"));
    assertEquals(1, entry.getChildren().size());
    
    // Test removal
    entry.removeChild("file1.txt");
    assertFalse(entry.hasChild("file1.txt"));
    assertEquals(0, entry.getChildren().size());
}

@Test
public void testDirectoryLeaseManager() {

    @Nullable
    default String getAttribute(@Nonnull String name) {
        return attribute(name);
    }

    @Deprecated(since = "4.0.0", forRemoval = true)
    @Nonnull
    default List<XmlNode> getChildren() {
        return children();
    }

    @Deprecated(since = "4.0.0", forRemoval = true)
    @Nullable
    default XmlNode getChild(String name) {
        return child(name);
    }

        for (DependencyNode child : root.getChildren()) {
            if (child.getArtifact() == null) {
                continue;
            }
            String childType = child.getArtifact().getProperty(ArtifactProperties.TYPE, "");
            if (!PROCESSOR_TYPE_IDS.contains(childType)) {
                continue;
            }
            for (DependencyNode transitive : child.getChildren()) {

        directoryLeaseManager.updateDirectoryCache(directoryPath, files);

        // Step 6: Verify cache is complete and populated
        assertTrue(cacheEntry.isComplete());
        assertEquals(2, cacheEntry.getChildren().size());
        assertTrue(cacheEntry.hasChild("document.txt"));
        assertTrue(cacheEntry.hasChild("subfolder"));

        // Step 7: Verify cached directory listing

        assertEquals(DirectoryCacheScope.IMMEDIATE_CHILDREN, entry.getScope());
        assertFalse(entry.isComplete());
        assertFalse(entry.hasChanges());
        assertTrue(entry.getChildren().isEmpty());
    }

    @Test
    public void testUpdateChild() {
        String childName = "file1.txt";
        long size = 1024L;
        long lastModified = System.currentTimeMillis();