How to use the electron-installer-common.getDefaultsFromPackageJSON function in electron-installer-common

async generateDefaults () {
    const [pkg, size, electronVersion] = await Promise.all([
      (async () => (await common.readMetadata(this.userSupplied)) || {})(),
      fsize(this.userSupplied.src),
      common.readElectronVersion(this.userSupplied.src)
    ])

    this.defaults = Object.assign(common.getDefaultsFromPackageJSON(pkg), {
      version: transformVersion(pkg.version || '0.0.0'),

      section: 'utils',
      priority: 'optional',
      size: Math.ceil((size || 0) / 1024),

      maintainer: this.getMaintainer(pkg.author),

      icon: path.resolve(__dirname, '../resources/icon.png'),
      lintianOverrides: []
    }, debianDependencies.forElectron(electronVersion))

    return this.defaults
  }

async generateDefaults () {
    const electronVersion = await common.readElectronVersion(this.userSupplied.src)
    const [pkg, requires] = await Promise.all([
      (async () => (await common.readMetadata(this.userSupplied)) || {})(),
      redhatDependencies.forElectron(electronVersion, this.userSupplied.logger)
    ])
    this.defaults = {
      ...common.getDefaultsFromPackageJSON(pkg, { revision: 1 }),
      version: pkg.version || '0.0.0',
      license: pkg.license,
      compressionLevel: 2,
      icon: path.resolve(__dirname, '../resources/icon.png'),
      pre: undefined,
      post: undefined,
      preun: undefined,
      postun: undefined,
      ...requires
    }

    return this.defaults
  }

async generateDefaults () {
    const pkg = (await common.readMetadata(this.userSupplied)) || {}

    const authors = pkg.author ? [typeof pkg.author === 'string' ? parseAuthor(pkg.author).name : pkg.author.name] : undefined

    this.defaults = Object.assign(common.getDefaultsFromPackageJSON(pkg), {
      version: pkg.version || '0.0.0',

      copyright: pkg.copyright || (authors && `Copyright \u00A9 ${new Date().getFullYear()} ${authors.join(', ')}`),
      authors: authors,
      owners: authors,

      exe: pkg.name ? `${pkg.name}.exe` : 'electron.exe',
      icon: path.resolve(__dirname, '../resources/icon.ico'),
      animation: path.resolve(__dirname, '../resources/animation.gif'),

      iconUrl: undefined,

      tags: [],

      certificateFile: undefined,
      certificatePassword: undefined,