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: active_storage.rb
    path of file: ./repos/weg-li/config/initializers
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

# ActiveStorage::Representations
    
  def download_file(key)
    instrument :download, key: key do
      io = file_for(key).download
      io.rewind

      yield io
    end
  end