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: notifier.rb
    path of file: ./repos/open-build-service/src/api/app/services/notification_service
    
    the code of the file until where you have to start completion: module NotificationService
  class Notifier
    # TODO: Remove `Event::CreateReport` after all existing records are migrated to the new STI classes
    EVENTS_TO
    
    def create_notification?(subscriber, channel)
      return false if subscriber.nil? || subscriber.away? || (channel == :rss && subscriber.rss_secret.blank?)
      return false unless notifiable_exists?
      return false unless create_report_notification?(event: @event, subscriber: subscriber)

      true
    end