How to use the genie-toolkit.parallelize function in genie-toolkit

const options = {
        locale: args.locale,
        thingpedia: './thingpedia.tt',
        entities: './entities.json',
        dataset: './dataset.tt',
        flags: args.flags,
        template: 'contextual.genie',
        random_seed: 'almond is awesome',
        maxDepth: args.maxdepth,
        targetPruningSize: args.target_pruning_size,
        debug: false, // no debugging, ever, because debugging also goes to stdout
    };

    inputFile
        .pipe(Genie.parallelize(PARALLEL_GENERATION,
            require.resolve('./workers/generate-contextual-worker.js'), options))
        .pipe(new Genie.DatasetStringifier())
        .pipe(process.stdout);

    await StreamUtils.waitFinish(process.stdout);

    process.disconnect();
}