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: notify.rb
    path of file: ./repos/homebrew-autoupdate/lib/autoupdate
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Autoupdate
  module Notify
    module_function

    def notifier
      (Formula["terminal-notifier"].opt_bin/"terminal-notifier") ||
        which("terminal-notifier") ||
        File.exist?("/Applications/terminal-notifier.app/Contents/MacOS/terminal-notifier") ||
        File.exist?(File.expand_path("~/Applications/terminal-notifier.app/Contents/MacOS/terminal-notifier"))
    end

    def 
    
    def path_to_notifier
      # This should allow notifications to work even if someone has
      # brew unlink'ed terminal-notifier.
      if File.executable?(Formula["terminal-notifier"].opt_bin/"terminal-notifier") ||
         (which("terminal-notifier") && File.executable?(notifier))
        File.path(File.expand_path(notifier))
      elsif File.exist?("/Applications/terminal-notifier.app/Contents/MacOS/terminal-notifier")
        "/Applications/terminal-notifier.app/Contents/MacOS/terminal-notifier"
      elsif File.exist?(File.expand_path("~/Applications/terminal-notifier.app/Contents/MacOS/terminal-notifier"))
        File.expand_path("~/Applications/terminal-notifier.app/Contents/MacOS/terminal-notifier")
      else
        false
      end