You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: nodebrew.rb
    path of file: ./repos/homebrew-core/Formula/n
    
    the code of the file until where you have to start completion: class Nodebrew < Formula
  desc "Node.js version manager"
  homepage "https://github.com/hokaccha/nodebrew"
  u
    
  def caveats
    <<~EOS
      You need to manually run setup_dirs to create directories required by nodebrew:
        #{opt_bin}/nodebrew setup_dirs

      Add path:
        export PATH=$HOME/.nodebrew/current/bin:$PATH

      To use Homebrew's directories rather than ~/.nodebrew add to your profile:
        export NODEBREW_ROOT=#{var}/nodebrew
    EOS
  end