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: package.rb
    path of file: ./repos/quik/lib/quik
    
    the code of the file until where you have to start completion: # encoding: utf-8

module Quik

class Package

  def initialize( key )   ## e.g. quikstart/gems

    
  def fetch_archive( src, dest )
    ## step 1 - fetch archive
    worker = Fetcher::Worker.new
    worker.copy( src, dest )
    ### fix: add src.sha5
    ### inside folder
    ### lets us check if current HEAD version is in place across datafiles etc.
    ## - try HTTP HEAD ?? to check?
  end