}
        return propertySpec;
    }

    protected static class DirectoryVisitState<T extends FilePropertyVisitor.VisitState> implements FilePropertyVisitor.VisitState {
        protected final T delegate;
        private final DirectorySnapshot directorySnapshot;

        public DirectoryVisitState(DirectorySnapshot unvisited, T delegate) {
            this.directorySnapshot = unvisited;

    @Override
    protected void preDirectory() {
        visitor.preDirectory(this);
    }

    @Override
    protected void preUnvisitedDirectory(DirectorySnapshot unvisited) {
        visitor.preDirectory(new DirectoryVisitState<FilePropertyVisitor.VisitState>(unvisited, this));
    }

    @Override
    protected void postDirectory() {
        visitor.postDirectory();
    }

    @Override
    protected void file() {

            throw new IllegalStateException("No strategy name for " + normalizer);
        }
        return normalizationStrategy;
    }

    private static class TaskDirectoryVisitState extends DirectoryVisitState<SnapshotTaskInputsBuildOperationType.Result.VisitState> implements SnapshotTaskInputsBuildOperationType.Result.VisitState {