index.put(relativePath.toRelativePath(), entrySnapshot);
            return SnapshotVisitResult.CONTINUE;
        });
        return index;
    }

    public static Map<String, FileSystemLocationSnapshot> rootIndex(FileSystemSnapshot snapshot) {
        HashMap<String, FileSystemLocationSnapshot> index = new HashMap<>();
        snapshot.accept(entrySnapshot -> {
            index.put(entrySnapshot.getAbsolutePath(), entrySnapshot);