How to use the @heroku-cli/command/lib/deps.deps.file function in @heroku-cli/command

options: async () => {
    let types: string[] = []
    let procfile = path.join(process.cwd(), 'Procfile')
    try {
      let buff = await deps.file.readFile(procfile)
      types = buff
        .toString()
        .split('\n')
        .map(s => {
          if (!s) return false
          let m = s.match(/^([A-Za-z0-9_-]+)/)
          return m ? m[0] : false
        })
        .filter(t => t) as string[]
    } catch (err) {
      if (err.code !== 'ENOENT') throw err
    }
    return types
  },
}

options: async () => {
    let files = await deps.file.readdir(process.cwd())
    return files
  },
}