*/
    void preDirectory(VisitState state);

    /**
     * Called when visiting a non-directory file.
     * <p>
     * {@link VisitState#getName()}, {@link VisitState#getPath()} and {@link VisitState#getHashBytes()} may be called during.
     */
    void file(VisitState state);

    /**
     * Called when exiting a directory.
     */
    void postDirectory();

    /**
     * Called when exiting a root.

    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public String getPath() {
        return path;
    }

    @Override
    public byte[] getHashBytes() {
        return hash.toByteArray();
    }

    @Override
    public void enterDirectory(DirectorySnapshot physicalSnapshot) {
        this.path = physicalSnapshot.getAbsolutePath();

        /**
         * The overall hash value for the inputs.
         * <p>
         * Null if the overall key was not calculated because the inputs were invalid.
         */
        @Nullable
        byte[] getHashBytes();

        /**
         * The hash of the classloader that loaded the task implementation.
         * <p>
         * Null if the classloader is not managed by Gradle.
         */
        @Nullable

            .filter(outputPropertyNames -> !outputPropertyNames.isEmpty())
            .map(ImmutableSet::asList)
            .orElse(null);
    }

    @Nullable
    public byte[] getHashBytes() {
        return getKey()
            .map(BuildCacheKey::toByteArray)
            .orElse(null);
    }

    @Override
    public Object getCustomOperationTraceSerializableModel() {

        /**
         * The overall hash value for the inputs.
         * <p>
         * Null if the overall key was not calculated because the inputs were invalid.
         */
        @Nullable
        byte[] getHashBytes();

        /**
         * The hash of the classloader that loaded the transform action implementation.
         * <p>
         * Null if the classloader is not managed by Gradle.
         */
        @Nullable