How to use the app-builder-lib/out/util/appBuilder.executeAppBuilderAsJson function in app-builder-lib

async function checkMacResult(packager: Packager, packagerOptions: PackagerOptions, checkOptions: AssertPackOptions, packedAppDir: string) {
  const appInfo = packager.appInfo
  const info = (await executeAppBuilderAsJson>(["decode-plist", "-f", path.join(packedAppDir, "Contents", "Info.plist")]))[0]

  expect(info).toMatchObject({
    CFBundleVersion: info.CFBundleVersion === "50" ? "50" : `${appInfo.version}.${(process.env.TRAVIS_BUILD_NUMBER || process.env.CIRCLE_BUILD_NUM)}`
  })

  // checked manually, remove to avoid mismatch on CI server (where TRAVIS_BUILD_NUMBER is defined and different on each test run)
  delete info.AsarIntegrity
  delete info.CFBundleVersion
  delete info.BuildMachineOSBuild
  delete info.NSHumanReadableCopyright
  delete info.DTXcode
  delete info.DTXcodeBuild
  delete info.DTSDKBuild
  delete info.DTSDKName
  delete info.DTCompiler
  delete info.ElectronTeamID

env.windowHeight = (window.height || 380).toString()
    }
  }
  else {
    delete env.backgroundColor
  }

  const args = ["dmg", "--volume", volumePath]
  if (specification.icon != null) {
    args.push("--icon", (await packager.getResource(specification.icon))!!)
  }
  if (backgroundFile != null) {
    args.push("--background", backgroundFile)
  }

  const data: any = await executeAppBuilderAsJson(args)
  if (data.backgroundWidth != null) {
    env.windowWidth = window == null ? null : window.width
    env.windowHeight = window == null ? null : window.height

    if (env.windowWidth == null) {
      env.windowWidth = data.backgroundWidth.toString()
    }
    if (env.windowHeight == null) {
      env.windowHeight = data.backgroundHeight.toString()
    }

    if (env.windowX == null) {
      env.windowX = 400
    }
    if (env.windowY == null) {
      env.windowY = Math.round((1440 - env.windowHeight) / 2).toString()