return new Promise((resolve, reject) => {
        zlib.gunzip(data, function (err, dezipped) {

            resolve(dezipped);


        });
    });

    return fs.readFile(filename, function(err, data) {
        if (err) { return callback(err); }

        return zlib.gunzip(data, function(err, content) {
            let result = {};

            if (err) { return callback(err); }

            try {
                result = JSON.parse(content);
            } catch (e) {
                return callback(e);
            }

            return callback(null, result);
        });
    });

gzip(compressMe, (err: Error | null, result: Buffer) => gunzip(result, (err: Error | null, result: Buffer) => result));

 (err: Error | null, result: Buffer) => gunzip(
     result, { finishFlush: constants.Z_SYNC_FLUSH },
     (err: Error | null, result: Buffer) => result
 )

 const unzipped = await new Promise(resolve => zlib.gunzip(zipped, (_, result) => resolve(result)));