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: runner_base.rb
    path of file: ./repos/gitlabhq/qa/qa/resource
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module QA
  module Resource
    class RunnerBase < Base
      attr_accessor :run_untagged,
        :image,
        :executor,
        :executor_image,
        :tags,
        :config

      attributes :id,
        :active,
        :paused,
        :runner_type,
        :online,
        :status,
        :ip_address,
        :description,
        :name,
        :is_shared,
        :contacted_at,
        :platform,
        :architecture,
        :projects,
        :revision,
        :tag_list,
        :version,
        :access_level,
        :maximum_timeout

      def initiali
    
      def api_post_body; end

      def wait_until_online
        Runtime::Logger.info('Waiting for runner to come online...')
        Support::Retrier.retry_until(max_duration: 60, sleep_interval: 1) do
          reload! && status == 'online'
        end
      end

      def restart
        Runtime::Logger.info("Restarting runner container #{name}...")
        @docker_container.restart
        wait_until_online
      end

      private

      def start_container_and_register
        @docker_container ||= Service::DockerRun::GitlabRunner.new(name).tap do |runner|
          runner.image = image if image

          Support::Retrier.retry_on_exception(sleep_interval: 5) do
            runner.pull
          end

          runner.token = token
          runner.address = Runtime::Scenario.gitlab_address
          runner.tags = tags if tags
          runner.config = config if config
          runner.executor = executor
          runner.executor_image = executor_image if executor == :docker
          runner.run_untagged = run_untagged if run_untagged
          runner.register!
        end
        populate_initial_id
      rescue StandardError => e
        @docker_container&.remove!
        raise(e)
      end

      def populate_initial_id
        tag_list = tags ? { tag_list: tags.compact.join(',') } : {}
        runner = runner(**tag_list)
        Runtime::Logger.debug("Details of the runner fetched using tag_list: #{runner}")
        @id = runner[:id]
      end

      def runner(**kwargs)
        raise NotImplementedError
      end
    end