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: config.rb
    path of file: ./repos/gitlabhq/vendor/gems/sidekiq-7.1.6/lib/sidekiq
    
    the code of the file until where you have to start completion: require "forwardable"

require "set"
require "sidekiq/redis_connection"

module Sidekiq
  # Sidekiq::Config represents the global configuration for an 
    
    def capsule(name)
      nm = name.to_s
      cap = @capsules.fetch(nm) do
        cap = Sidekiq::Capsule.new(nm, self)
        @capsules[nm] = cap
      end
      yield cap if block_given?
      cap
    end