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

const tpClient = new AdminThingpediaClient(task.language);
    const schemas = new ThingTalk.SchemaRetriever(tpClient, null, true);
    const parser = new LocalParserClient(outputdir, task.language);
    await parser.start();

    const output = fs.createReadStream(path.resolve(datadir, 'eval.tsv'))
        .setEncoding('utf8')
        .pipe(byline())
        .pipe(new Genie.DatasetParser({
            contextual: task.modelInfo.contextual,
            preserveId: true,
            parseMultiplePrograms: true
        }))
        .pipe(new Genie.SentenceEvaluatorStream(parser, schemas, true /* tokenized */, argv.debug))
        .pipe(new Genie.CollectSentenceStatistics());

    const result = await output.read();
    await task.setMetrics(result);

    await Promise.all([
        parser.stop(),
        TokenizerService.tearDown(),
        AbstractFS.removeTemporary(jobdir)
    ]);
};