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: change.rb
    path of file: ./repos/gitlabhq/app/services/git/wiki_push_service
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Git
  class WikiPushService
    class Change
      include Gitlab::Utils::Strong
    
      def event_action
        case raw_change.operation
        when :added
          :created
        when :deleted
          :destroyed
        else
          :updated
        end