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: versioned_recipe_list.rb
    path of file: ./repos/chef/lib/chef/run_list
    
    the code of the file until where you have to start completion: #
# Author:: Stephen Delano (<stephen@chef.io>)
# Author:: Seth Falcon (<seth@chef.io>)
# Copyright:: Copyright (c) Chef Software Inc.
# License:: Apache License, 
    
      def with_version_constraints_strings
        map do |recipe_name|
          if @versions[recipe_name]
            "#{recipe_name}@#{@versions[recipe_name]}"
          else
            recipe_name
          end
        end