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: 20190724162522_migrate_forwarded_emails_behaviour_site_settings.rb
    path of file: ./repos/discourse/db/migrate
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class MigrateForwardedEmailsBehaviourSiteSettings < ActiveRecord::Migration[5.2]
  def up
    execute <<~SQL
      UPDATE site
    
  def down
    execute <<~SQL
      UPDATE site_settings
      SET name      = 'enable_forwarded_emails',
          data_type = 5,
          value     = 't'
      WHERE name = 'forwarded_emails_behaviour' AND value = 'create_replies';
    SQL

    execute <<~SQL
      DELETE
      FROM site_settings
      WHERE name = 'forwarded_emails_behaviour';
    SQL
  end