src/vs/workbench/browser/parts/editor/breadcrumbsPicker.ts/FileDataSource/getChildren
class FileDataSource:	async getChildren(element: IWorkspace | URI | IWorkspaceFolder | IFileStat): Promise<(IWorkspaceFolder | IFileStat)[]> {
		if (isWorkspace(element)) {
			return element.folders;
		}
		let uri: URI;
		if (isWorkspaceFolder(element)) {
			uri = element.uri;
		} else if (URI.isUri(element)) {
			uri = element;
		} else {
			uri = element.resource;
		}
		const stat = await this._fileService.resolve(uri);
		return stat.children ?? [];
	}