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: service_spec.rb
    path of file: ./repos/pakyow/core/spec/unit/runnable
    
    the code of the file until where you have to start completion: require "pakyow/runn
    
  def start_service
    instance.prepare

    @notifier = Thread.new do
      Pakyow.async do
        instance.run
      end
    end

    sleep(0.25)
  end