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: ruby_version.rb
    path of file: ./repos/heroku-buildpack-ruby/lib/language_pack
    
    the code of the file until where you have to start completion: require "language_pack/shell_helpers"

module LanguagePack
  class RubyVersion
    class BadVersionEr
    
    def set_version
      if @bundler_output.empty?
        @set     = false
        @version = none
      else
        @set     = :gemfile
        @version = @bundler_output
      end