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: envfile.rb
    path of file: ./repos/newrelic-ruby-agent/test/multiverse/lib/multiverse
    
    the code of the file until where you have to start completion: # This file is distributed under New Relic's license terms.
# See https://github.com/newrelic/newrelic-ruby-agent/blob/main/LICENSE for complete details.
# frozen_string_literal: true

module Multiverse
  # Reads an envfile.rb and converts it in
    
    def add_version(version)
      return unless version
      return ", #{version}" unless version[0].match?(/^[><=0-9]$/) # permit git, github, path, etc. pragmas

      # If the Envfile based version starts with '>', '<', '=', '>=', or '<=',
      # then preserve that prefix when creating a Gemfile. Otherwise, twiddle
      # wakka the version (prefix the version with '~>')
      twiddle_wakka = !version.start_with?('=', '>', '<')

      ", '#{'~> ' if twiddle_wakka}#{version}'"
    end