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: release_listing.rb
    path of file: ./repos/fastlane/supply/lib/supply
    
    the code of the file until where you have to start completion: module Supply
  class ReleaseListing
    attr_accessor :track
   
    
    def initialize(track, version, versioncodes, language, text)
      self.track = track
      self.version = version
      self.versioncodes = versioncodes
      self.language = language
      self.release_notes = text
    end