How to use the gzip-size.file function in gzip-size

const fsStatGzip = (file: string) => {
  if (fileGzipStats[file]) return fileGzipStats[file]
  fileGzipStats[file] = gzipSize.file(file)
  return fileGzipStats[file]
}

	const fileSizePromises = section.filesToLoad.map( f => gzipSize.file( f ) );
	const fileSizes = await Promise.all( fileSizePromises );

(async () => {
  metalsmith(path.resolve(__dirname, '../'))
    .source('.')
    .use(ignore('src/**/*'))
    .metadata({
      title: 'currency.js',
      description: pkg.description,
      version: pkg.version,
      dist: pkg.browser,
      size: prettyBytes(await gzipSize.file(path.resolve(__dirname, '../../', pkg.browser)))
    })
    .use(markdown({
      highlight: hljs
    }))
    .use(tableOfContents)
    .use(hbs)
    .use(concatFiles)
    .use(layout)
    .build(err => {
      if(err) {
        throw err;
      }
    });
})();

async function run() {
    return gzipSize.file(path.resolve(`./libs/${lib}/dist/main.js`));
  }

results.files.map(async (entry) => ({
      name: entry.path,
      gzipSize: await gzipSize.file(entry.fullPath),
      size: entry.stat.size,
    })),
  );