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: torrent_manager_service.rb
    path of file: ./repos/muvee/app/services
    
    the code of the file until where you have to start completion: class TorrentManagerService

  TRACKERS = %w(
    udp://open.demonii.com:1337
    udp://tracker.istole.it:80
    http://tracker.yify-torrents.com/announce
    udp://tracker.publicbt.com:80
    udp://tracker.openbittorrent.com:80
    udp://tracker.coppersurfer.tk:6969
    udp://exodus.desync.com:6969
    http://exodus.desync.com:6969/announce
  ).freeze

  def initialize
    config = ApplicationConfiguration.first
    @start_path = confi
    
  def initialize
    config = ApplicationConfiguration.first
    @start_path = config.torrent_start_path
    throw "No initial path for torrent download" if @start_path.blank?
  end

  def client
    @client ||= TransmissionApi::Client.new(url: "http://127.0.0.1:9091/transmission/rpc")
  end

  def self.start_transmission
    Process.fork do
      Process.setsid
      Process.fork do
        exec 'transmission-gtk'
      end
      exit
    end
  end

  def percentage_done(transmission_id)
    torrent = find(transmission_id)
    return 0 if torrent.blank?
    torrent["percentDone"] * 100.0
  end

  def find(transmission_id)
    client.all.find { |t| t["addedDate"] == transmission_id }
  rescue Net::ReadTimeout
    nil
  end

  def check_completion_status(transmission_id)
    torrent = client.all.find { |t| t["addedDate"] == transmission_id }
    if torrent.blank?
      return "missing"
    else
      if torrent["percentDone"] == 1
        return "complete"
      else
        return "incomplete"
      end
    end