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: notification_lib.rb
    path of file: ./repos/notifications-rails/notification-settings/lib/notification_settings
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'notification-handler'
require 'active_support'

module NotificationSettings
  module NotificationLib
    extend ActiveSupport::Concern

    included do
      before_creat
    
      def local_delivery_method_category_setting(delivery_method, default = nil)
        category_delivery_method_setting(target, category, delivery_method,
                                         default) &&
          (subscription.nil? ||
            category_delivery_method_setting(subscription, category,
                                             delivery_method, default))
      end