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: changes_required_notification.rb
    path of file: ./repos/hyrax/app/services/hyrax/workflow
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
module Hyrax
  module Workflow
    class ChangesRequiredNoti
    
      def message
        I18n.t('hyrax.notifications.workflow.changes_required.message',
               title: title,
               link: (link_to work_id, document_path),
               comment: comment)
      end

      def users_to_notify
        user_key = document.depositor
        super << ::User.find_by_user_key(user_key)
      end
    end
  end