children = append(children, tok(n.Type.Func, len("func")))
		if n.Recv != nil {
			children = append(children, n.Recv)
		}
		children = append(children, n.Name)
		if tparams := n.Type.TypeParams; tparams != nil {
			children = append(children, tparams)
		}
		if n.Type.Params != nil {
			children = append(children, n.Type.Params)
		}
		if n.Type.Results != nil {

  // at most two children for the prefix to detect if a directory is empty.
  auto gcs_file = static_cast<GCSFile*>(filesystem->plugin_filesystem);
  auto childrens = GetChildrenBounded(gcs_file, path, 2, true, true, status);
  if (TF_GetCode(status) != TF_OK) return;
  if (childrens.size() > 1 || (childrens.size() == 1 && !childrens[0].empty()))
    return TF_SetStatus(status, TF_FAILED_PRECONDITION,

                        PendingOperation pending = pendings.remove(finish.id);
                        assert pending != null;

                        List<BuildOperationRecord> children = childrens.remove(finish.id);
                        assert children != null;

                        SerializedOperationStart start = pending.start;

                        Map<String, ?> detailsMap = uncheckedCast(start.details);

        children.collectMany { child ->
            def childIndex = children.indexOf(child)
            [
                new CaseSensitivityTestSpec(children, child, childIndex),
                new CaseSensitivityTestSpec(children, "$child/a/something", childIndex),
                new CaseSensitivityTestSpec(children, "$child/A/something", childIndex),

        barInsight[2].children[0].isLeaf == false
        barInsight[2].children[0].alreadyRendered == false
        barInsight[2].children[0].children.size() == 1
        barInsight[2].children[0].children[0].name == 'compile'
        barInsight[2].children[0].children[0].resolvable == 'RESOLVED'
        barInsight[2].children[0].children[0].hasConflict == false
        barInsight[2].children[0].children[0].isLeaf == true

     */
    FileSystemNode selectedChild

    abstract protected NODE createInitialRootNode(ChildMap<CHILD> children);

    abstract protected CHILD mockChild()

    void setupTest(VirtualFileSystemTestSpec spec) {
        this.children = createChildren(spec.childPaths)
        this.initialRoot = createInitialRootNode(children)
        this.searchedPath = spec.searchedPath
        this.selectedChildPath = spec.selectedChildPath

    public DefaultIdeaProject setChildren(Collection<? extends DefaultIdeaModule> children) {
        this.children.clear();
        this.children.addAll(children);
        return this;
    }

    public Collection<DefaultIdeaModule> getChildren() {
        return children;
    }

    public Collection<DefaultIdeaModule> getModules() {
        return children;
    }

        children << CHILDREN_LISTS
    }

    def "children names #children are sorted the same with path sensitive and name only comparison"() {
        def nameSorted = children.toSorted(PathUtil.&compareFileNames)
        def caseSensitiveSorted = children.toSorted(getPathComparator(CASE_SENSITIVE))

        expect:
        nameSorted == caseSensitiveSorted

        where:
        children << [
            ["bAdA", "BaDb"],

        assert rootProject.children.size() == 3 // All projects are created when storing
        with(rootProject.children.first() as Map<String, Object>) {
            assert name == 'a'
            assert path == ':a'
            assert projectDir == file('a').absolutePath
            assert buildFile == file('a/build.gradle').absolutePath
            with(children.first()) {
                assert name == 'b'

func ChainAssertIndex(u *U) J {
	return u.
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0].(*U).
		Children[0]
}

type UArr struct {
	Children [2]J
}