* The implementation uses {@link FileSystemLocationSnapshot#BY_NAME} ordering.
 * If you already provide the children in sorted order, use {@link #noSortingRequired()} to avoid the overhead of sorting again.
 */
public class MerkleDirectorySnapshotBuilder implements DirectorySnapshotBuilder {
    private static final HashCode DIR_SIGNATURE = Hashing.signature("DIR");

    }

    public static FileSystemSnapshot filterSnapshot(SnapshottingFilter.FileSystemSnapshotPredicate predicate, FileSystemSnapshot unfiltered) {
        DirectorySnapshotBuilder builder = MerkleDirectorySnapshotBuilder.noSortingRequired();
        AtomicBoolean hasBeenFiltered = new AtomicBoolean();
        unfiltered.accept(new RelativePathTracker(), new FilteringVisitor(predicate, builder, hasBeenFiltered));
        if (builder.getResult() == null) {