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: join_worker.rb
    path of file: ./repos/gitlabhq/app/workers/object_pool
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module ObjectPool
  class JoinWorker # rubocop:disable
    
    def perform(_pool_id, project_id)
      project = Project.find_by_id(project_id)
      return unless project&.pool_repository&.joinable?

      project.link_pool_repository

      Repositories::HousekeepingService.new(project).execute
    end