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.rb
    path of file: ./repos/vagrant/plugins/commands/serve
    
    the code of the file until where you have to start completion: # Copyright (c) HashiCorp, Inc.
# SPDX-License-Identifier: BUSL-1.1

require "ostruct"

module VagrantPlugins
  module CommandServe
    module Service
      class
    
        def protoService(klass)
          Class.new(klass) do
            [Util::FuncSpec::Service,
              Util::HasLogger,
              Util::HasMapper,
              Util::HasSeeds::Service,
              Util::NamedPlugin::Service,
              Util::ServiceInfo,
              Util::ExceptionTransformer].each { |m| include m }

            attr_reader :broker

            def initialize(broker:)
              if broker.nil?
                raise ArgumentError,
                  "Broker must be provided"
              end
              @broker = broker
            end

            def cache
              CommandServe.cache
            end
          end