where:
        vfsSpec << CHILD_IS_PREFIX
    }

    static ChildMap<FileSystemNode> sortedChildren(String path1, FileSystemNode child1, String path2, FileSystemNode child2) {
        def compared = PathUtil.getPathComparator(CASE_SENSITIVE).compare(path1, path2)
        def entry1 = new ChildMap.Entry<FileSystemNode>(path1, child1)
        def entry2 = new ChildMap.Entry<FileSystemNode>(path2, child2)