return compressionMethod != CompressionMethod.STORED;
        }

        private static long computeCrc32Of(byte[] contents) {
            return Hashing.crc32().hashBytes(contents).padToLong();
        }
    }

    @Override
    public void directory(File destinationDir, Action action) {
        try {
            buildDirectory(destinationDir, action);
        } catch (Exception e) {