How to use the app-builder-lib.PublishManager function in app-builder-lib

async function packAndCheck(packagerOptions: PackagerOptions, checkOptions: AssertPackOptions) {
  const cancellationToken = new CancellationToken()
  const packager = new Packager(packagerOptions, cancellationToken)
  const publishManager = new PublishManager(packager, {publish: "publish" in checkOptions ? checkOptions.publish : "never"})

  const artifacts: Map> = new Map()
  packager.artifactCreated(event => {
    if (event.file == null) {
      return
    }

    assertThat(event.file).isAbsolute()
    addValue(artifacts, event.packager.platform, event)
  })

  const {outDir, platformToTargets} = await packager.build()
  await publishManager.awaitTasks()

  if (packagerOptions.platformPackagerFactory != null) {
    return {packager, outDir}